31results about How to "Delayed softening and shedding" patented technology

The invention discloses an electrode active material for a lead-acid storage battery. The electrode active material comprises lead powder and a non-metallic titanium compound; the lead powder comprises one or more kinds of metal lead powder, ball-milling lead powder, Barton lead powder, Pb<2>O powder, PbO powder, Pb<2>O<3> powder, Pb<3>O<4> powder and PbO<2> powder; and the non-metallic titanium compound comprises one or more kinds of titanium sulfide, titanium nitride, titanium boride, titanium carbide, titanium hydride, titanium hydroxide, titanium silicide, a symbiotic blend of the abovementioned compounds on an atomic micro level or atomic cluster level, and doped compounds formed by doping the abovementioned compounds with one or more kinds of F, Sb, Sn, Ca, Bi, Co, Ca, Al, Mg, N, P, O and C. By virtue of the electrode active material for the lead-acid storage battery with an improved formula, the specific power, specific energy, charging-discharging efficiency, cycle life, low-temperature performance and the like of the lead-acid storage battery can be obviously improved.

The invention discloses an electrode active material for a lead-acid storage battery. The electrode active material comprises lead powder and composite material granules; the lead powder comprises one or more kinds of metal lead powder, ball-milling lead powder, Barton lead powder, Pb<2>O powder, PbO powder, Pb<2>O<3> powder, Pb<3>O<4> powder and PbO<2> powder; and the composite material granules comprise one or more kinds of coating type composite material granules and mixed type composite material granules. By virtue of the electrode active material for the lead-acid storage battery with an improved formula, the specific power, specific energy, active material utilization rate, charging-discharging efficiency, cycle life, low-temperature performance and the like of the applied lead-acid storage battery can be obviously improved.

The invention relates to a long-service-life high-specific-energy maintenance-free starting lead-acid storage battery and a production method thereof. According to the battery, lead plasters coated atthe upper portion and the lower portion of a grid of at least one of a positive electrode plate and a negative electrode plate are different, and the conductivity or the utilization rate of the leadplaster at the lower portion of the grid is superior to that of the lead plaster at the upper portion of the grid. According to the invention, the upper portion and the lower portion of an electrode plate adopt different formulas and are respectively coated and filled, wherein the acid content of the lead plaster at the lower portion is different so as to reduce that the apparent density of the lead plaster or the conductive substance content of the lead plaster at the lower portion is different so as to improve the utilization rate, so that the problem of low utilization rate of the active substance at the lower portion is effectively improved, and the capacity of the battery is improved; the internal resistance of the lower portion is reduced, and the utilization rate is improved, so that the problem of high proportion of upper discharge capacity is slowed down, wherein the upper discharge capacity of the electrode plate is reduced and the discharge rate is reduced under the condition of the same discharge capacity, so that the softening and falling of the active substance are reduced, and the service life of the battery is prolonged; and under the condition of the same paste coating amount, the capacity, the low-temperature discharge performance and the cycle durability of the prepared battery are improved.

The invention discloses a lead-calcium formation colloid electrolyte which is composed of the following components in percentage by weight: 0.8-5% of gas-phase silicon dioxide, 0.1-2% of sodium silicate, 1-2% of anhydrous sodium sulfate, 0.1-0.5% of stannous sulfate, 0.05-0.5% of sodium carboxymethyl cellulose, 0.02-0.5% of bismuth trioxide, 0.2-3% of phosphoric acid, 28-38% of sulfuric acid and the balance of water. The invention also discloses a preparation method of the lead-calcium formation colloid electrolyte. When being used for preparing a lead-calcium formation battery, the colloid electrolyte improves the early capacity attenuation effect of the lead-calcium formation battery, decelerates the softening shedding of the active substances at the positive pole, and prolongs the deep cycle service life of the battery. The colloid electrolyte disclosed by the invention has the advantages of favorable consistency, favorable colloid thixotropy and favorable colloid stability.

The invention belongs to the technical field of zinc-nickel batteries. The invention discloses a high-energy-density zinc-nickel battery positive electrode manufacturing method. The method comprises:adding a thickner to a raw material A, mixing uniformly, to obtain a slurry A, dissolving a divalent nickel compound in water to obtain an aqueous solution, adding the slurry A and a surfactant, stirring and treating to obtain a slurry B, adding polytetrafluoroethylene to the slurry B, to prepare a positive electrode slurry, putting a positive electrode matrix into the positive electrode slurry until the positive electrode matrix is completely submerged, and then taking the positive electrode matrix out after a period, preparing a battery positive electrode piece, and performing aftertreatmentto obtain a high-energy-density zinc-nickel battery positive electrode. The method can solve a problem that high-energy-density zinc-nickel battery positive electrode active materials are not tightlycombined, and can reduce softening and shedding of the positive electrode active materials, reduce internal resistance, improve utilization ratio of the active materials, improve charging acceptanceof the electrode, and improve battery capacity, cycle life and charge and discharge conversion efficiency, to prevent early decay of battery capacity.

The invention discloses an enhanced positive plate of a power lead-acid storage battery. The positive plate comprises a positive plate grid. The positive plate is characterized in that a carbon fiber powder layer is sprayed and pressed on the active substance surface of the positive plate; since the positive plate of the battery is formed by spraying and pressing a carbon fiber powder layer on the active substance of the positive pole, the carbon fiber powder has higher specific strength and specific modulus, and each constituent of the carbon fiber dose not participate in the electrochemical reaction of the battery in the charging or discharging process of the battery, the positive plate has higher strength, high and strong carrying capacity and stronger creep deformation resistance, thus the structure strength and the size stability of the positive plate can be improved greatly, the active substance of the positive pole is not easy to soften and fall off, and the service life of the lead-acid storage battery can be prolonged consequentially.

The invention provides an acid-free external formation method of a lead-acid storage battery and the lead-acid storage battery. During formation, a sulfuric acid electrolyte is substituted by a neutral electrolyte, acid mist pollution is prevented, and lead-containing wastewater generated during washing of the traditional external formation pole plate is avoided; meanwhile, the formation efficiency and the pole plate quality are superior to those of an internal formation process; and moreover, no waste acid is generated like the internal formation process, and the purposes of saving energy, reducing emission and also improving product quality are achieved.

The invention discloses a long-life silicon-based bipolar lead storage battery positive electrode lead paste and a preparation method thereof. The positive electrode lead paste formula comprises the following components: lead powder, short fibers, graphite powder, SnSO4, Ti4O7, Sb2O3, 4PbO.PbSO4, sodium perborate, dilute sulfuric acid and deionized water. The preparation method comprises the steps: S1, uniformly dispersing graphite powder, 4PbO.PbSO4, SnSO4, Ti4O7, Sb2O3, sodium perborate materials and the short fibers into lead powder during preparation of lead paste, and carrying out dry stirring for 5 minutes until the materials are uniformly mixed, so as to prepare a premix 1; S2, quickly adding deionized water into the premix 1, and stirring for 10 minutes until the deionized water and the premix 1 are uniformly mixed, so as to obtain a premix 2; S3, slowly adding dilute sulfuric acid into the premix 2, controlling the adding time to be 10 min and the mixing temperature to be 70 DEG C, continuously stirring for 10 min, cooling to 50 DEG C, measuring the apparent density, and controlling the apparent density to be 4.45+/-0.1 g/cm<3>. According to the invention, the electric conductivity of the lead paste can be obviously improved, the softening and falling of the lead paste can be effectively delayed, and the cycle life cycle is prolonged.

The invention discloses a lead-calcium formation colloid electrolyte which is composed of the following components in percentage by weight: 0.8-5% of gas-phase silicon dioxide, 0.1-2% of sodium silicate, 1-2% of anhydrous sodium sulfate, 0.1-0.5% of stannous sulfate, 0.05-0.5% of sodium carboxymethyl cellulose, 0.02-0.5% of bismuth trioxide, 0.2-3% of phosphoric acid, 28-38% of sulfuric acid and the balance of water. When being used for preparing a lead-calcium formation battery, the colloid electrolyte improves the early capacity attenuation effect of the lead-calcium formation battery, decelerates the softening shedding of the active substances at the positive pole, and prolongs the deep cycle service life of the battery.

The invention provides lead paste for a battery positive plate and a preparation method of the lead paste and the positive plate. The lead paste for the battery positive plate comprises the following raw material components: lead powder, red lead powder, a mixture of tetrabasic lead sulfate and metal oxide, sulfuric acid, water and modified silicon; the modified silicon powder is added while the mixture of the tetrabasic lead sulfate and the metal oxide is added into the formula of the lead plaster, so that the growth of tetrabasic lead sulfate crystals is promoted; the crystal size of the crystals is further influenced by the addition of the modified silicon powder, the crystal size is finer and more uniform, the cohesiveness between the lead plaster is better, the adhesion force and coating capacity are better, and the problem that the lead paste is dispersed after tetrabasic lead sulfate is independently added and the problem that the lead paste is sticky after modified silicon powder is independently added are solved; and through simultaneous adding and use, crystals which are regular, fine and uniform in size are formed, and the paste mixing and plate coating technological performance is improved.

The invention relates to a method for repairing a positive active material of a lead-acid battery, and belongs to the technical field of lead-acid storage batteries. The method comprises the following steps: (1) carrying out low-current complete discharge on a lead-acid battery to be repaired; (2) taking out the positive pole group, forming a transition battery with the auxiliary pole group, filling sulfuric acid for electrolysis, and charging; (3) taking out the positive electrode group, washing with water, putting into a constant-temperature box, and carrying out slow oxidation treatment; (4) recombining the plate group and the auxiliary plate group into a transition battery, pouring a sodium sulfate solution, standing and then charging; and (5) taking out the positive electrode group, washing with water, drying, combining the dried positive electrode group with the negative electrode group of the primary battery, putting into the original battery jar, and pouring a sulfuric acid electrolyte for charging. The method is scientific and reasonable in design, does not need to add other additives, fundamentally slows down the crystallization process of the positive active material lead dioxide, inhibits softening and falling off and performance reduction of the active material, and obviously prolongs the cycle service life of the lead-acid battery.