11results about How to "Improve charge acceptance" patented technology

This invention discloses a low-temperature negative electrode lead paste formulation and its preparation method. The raw materials are as follows by weight percentage: lead powder: 82%-88%, barium sulfate: 5%-12%, sodium lignosulfonate: 0.2%-1.0%, humic acid: 0.5%-1.0%, carbon black: 1%-2%, expanded graphite: 1%-2%, graphene: 0.5%-1.5%, and deionized water: balance. A mixture of spherical lead powder and flake lead powder (spherical powder accounting for 60%-70%) is used. The high specific surface area of ​​the spherical lead powder improves the wettability of the electrolyte, while the layered structure of the flake lead powder increases the porosity. The synergistic effect of these two materials increases the porosity of the negative electrode active material to 65%-70% (compared to approximately 55%-60% in traditional lead paste), accelerating the dissolution of lead sulfate and the diffusion of Pb²⁺.

The EFB battery comprises a positive plate, a negative plate, a partition plate, electrolyte and a shell, the positive plate comprises a positive plate grid and positive lead plaster coated on the positive plate grid; the negative plate comprises a negative plate grid and negative lead plaster coated on the negative plate grid; the positive lead paste is prepared from the following raw materials in parts by weight: 95 to 105 parts of lead powder, 0.05 to 0.15 part of super-strong fiber, 0.05 to 0.2 part of carbon fiber, 0.2 to 0.4 part of carboxymethyl cellulose sodium, 8 to 10 parts of sulfuric acid and 9 to 11 parts of deionized water; the negative electrode lead paste is prepared from the following raw materials in parts by weight: 95 to 105 parts of lead powder, 0.05 to 0.15 part of super-strong fiber, 0.55 to 0.75 part of barium sulfate, 0.05 to 0.2 part of humic acid, 0.05 to 0.3 part of Norway lignin, 0.02 to 0.06 part of carbon black, 0.05 to 0.2 part of carbon fiber, 1.05 to 1.95 parts of an additive A, 0.05 to 0.2 part of an additive B, 0.02 to 0.05 part of ketjen black, 7 to 9 parts of sulfuric acid and 7.5 to 9.1 parts of deionized water. The partition plates are PE partition plates, vertical ribs are arranged on the positive electrode side, and tooth-shaped ribs are arranged on the negative electrode side. By improving the lead plaster and the partition plate, the service life of the battery is effectively prolonged, and the charging acceptance is enhanced.

An organic expander for lead storage batteries and a method for producing the same according to the present invention are: an organic expander for lead storage batteries containing lignosulfonate, in which a content of reducing sugars per solid content is 5% by mass or less of the total, and a content of a substance with a molecular weight of 5,000 or less per solid content is 30% by mass or less of the total; and a method for producing the organic expander for lead storage batteries, the method including a step of subjecting a sulfite cooking black liquor to ultrafiltration treatment using an ultrafiltration membrane to recover a concentrated liquor of the sulfite cooking black liquor obtained.

The invention relates to the technical field of lead-acid storage batteries, in particular to tubular lead-carbon battery positive and negative plates and a preparation method thereof. The positive and negative pole plates of the tubular lead-carbon battery comprise positive and negative pole plate grids and filled active substance powder, the positive and negative pole plate grids are of a fence structure formed by cross beams and conductive cores perpendicular to the cross beams, and a sleeve layer is arranged outside the positive and negative pole plate grids; the active substance powder is filled in a gap between the sleeve layer and the conductive core; the active substance is prepared from the following substances in percentage by weight: 1 to 25 weight percent of lead powder, 1 to 50 weight percent of capacitive carbon material, 0.1 to 0.5 weight percent of carbon black, 2 to 97 weight percent of barium sulfate, 0 to 1.2 weight percent of sodium lignin sulfonate, 0.5 to 2 weight percent of humic acid and 0.05 to 0.1 weight percent of short fiber. The manufacturing process is simple and easy to implement, solves the problems that the lead paste is poor in stability and easy to fall off, stabilizes the structure of the lead paste, prevents the lead paste from falling off, and prolongs the service life of the battery.

This application discloses a power supply control method, device, medium, and vehicle for a hybrid supercapacitor system. Upon receiving a vehicle start command, the method acquires the real-time temperature and real-time state of charge of the hybrid supercapacitor component. If the real-time temperature is determined to be below a self-heating trigger temperature threshold, the method controls the component to output a starting current to the vehicle start component. This starting current flows through an internal resistor, generating Joule heat and thus raising the component temperature. After the start-up process is completed, the method dynamically adjusts the output current and output voltage parameters of the power conversion component based on the real-time temperature and state of charge to control the component's real-time temperature within a preset operating temperature range. This application utilizes the start-up process to achieve synchronous self-heating, eliminating the need for additional heating hardware and preheating waiting time. Furthermore, dynamic reheating after start-up effectively maintains a suitable operating temperature, improves vehicle start-up delay, and significantly enhances the reliability of the system's low-temperature power supply.

The invention relates to the technical field of battery formation processes, in particular to a 2V high-magnification lead-acid storage battery formation method, which comprises the following steps of: putting a lead-acid storage battery which is quantitatively injected with acid into a constant-temperature water bath of which the temperature is controlled at 30-40 DEG C, and then performing formation, namely standing for 1 hour at the current of 0A; constant-current charging: the charging current is 0.05 CA, and the charging time is 4 hours; gradient charging: the charging current is gradually increased from 0.15 CA to 0.20 CA, and the charging time is 12 hours; charging and discharging for multiple times by adopting a gradient current value; installing an exhaust valve, and testing related indexes of the lead-acid storage battery; according to the formation method of the 2V high-magnification lead-acid storage battery, the difference between the batteries is balanced, the voltage and the internal resistance between the batteries are balanced, and the formation period is only 62 hours.

The invention discloses lead paste for a lead-acid battery and a preparation process of the lead paste, and belongs to the technical field of lead-acid batteries, the lead paste comprises the following raw materials in parts by weight: 90-100 parts of lead powder, 0.1-0.2 part of high-strength short fiber, 15-20 parts of lead tetraoxide, 1-1.5 parts of tetrabasic lead sulfate, 5-12 parts of modified graphene, 0.2-0.3 part of bismuth oxide, 0.1-0.15 part of stannous mono-sulphate, 10-15 parts of sulfuric acid solution and 8-16 parts of deionized water; the modified graphene is prepared by the following steps: uniformly mixing concentrated sulfuric acid and sodium nitrate in a reaction flask, and slowly adding graphite powder under an ice-water bath condition. By optimizing the formula and the preparation process of the lead paste for the lead-acid battery, and particularly introducing the modified graphene, the conductivity and the thermal stability of the lead paste are remarkably improved, the binding force between the lead paste and a grid is enhanced, and the falling of active substances is reduced, so that the cycle life of the battery is remarkably prolonged, and the capacity of the battery is remarkably improved.

This utility model belongs to the field of battery technology, specifically relating to a grid structure and a lead-acid battery containing the same. The grid structure includes a frame body, lugs connected to the frame body, and vertical and horizontal ribs arranged crisscrossingly inside the frame body. The frame body also has two adjacent horizontal reinforcing ribs inside, dividing the frame body into an upper region, a middle region, and a lower region. The middle region has several staggered ribs, which are connected to the vertical ribs in the upper and lower regions, respectively, with the connection points located on the horizontal reinforcing ribs. This utility model optimizes the grid structure design, reducing the grid height, increasing the number of radial rib structures and vertical ribs (ribs connecting the lugs), and thickening the ribs near the lugs on the grid to improve the grid's conductive cross-sectional area and corrosion resistance. Simultaneously, it increases the number of vertical ribs at the bottom of the grid, improving the charging acceptance capacity of the lower plates and alleviating the tendency for sulfation at the bottom of the plates during battery use.

The present invention provides: a separator for lead acid storage batteries, the separator exhibiting excellent charge acceptance performance and excellent liquid loss characteristics when in use under PSoC, while being not susceptible to the occurrence of ply separation within a lead acid storage battery and having good ER; and a lead acid storage battery which uses this separator for lead acid storage batteries. The present invention provides a separator for lead acid storage batteries, the separator comprising a base material and a conductive layer that is superposed on at least one surface of the base material. The conductive layer comprises: a continuous phase that is formed of a conductive material; and dispersed phases in the continuous phase, the dispersed phases being formed of at least one low-potential metal material that is selected from the group consisting of metals having a standard electrode potential of -0.7 V or less, metal compounds containing these metals, and combinations of these metals and metal compounds.

This invention discloses a lead-acid automotive starting battery with a carbon-coated negative electrode separator and its preparation method, belonging to the field of automotive lead-acid battery technology. By applying a conductive carbon material coating to the surface of the separator, the separator is tightly attached to the negative electrode active material, forming a porous conductive layer that balances conductivity and porosity. During charging, this effectively guides electron conduction and uniformly distributes the electrolyte, solving the problems of sulfate precipitation and reduced charge acceptance in traditional lead-acid batteries at low charging rates or in partially charged states, thus improving the battery's charging efficiency and cycle life.

This invention discloses a lead-acid battery negative electrode paste and its preparation method. The additives in the negative electrode paste of this invention, by incorporating sodium polyaspartate (PASP) and the hydroxyl, carboxyl, and methoxy groups from lignin and humic acid, can adsorb onto the surfaces of lead and lead sulfate, inhibiting the transformation of the lead sulfate layer into a selective semi-permeable membrane, thereby achieving depassivation and preventing or slowing down sulfation. Simultaneously, the addition of indium trioxide and vanillin increases the hydrogen evolution overpotential of the negative electrode, inhibits hydrogen evolution, and improves battery life. Carboxymethyl cellulose acts as a binder in the active material, preventing foaming and detachment from the grid. Due to its excellent water absorption properties, it facilitates the penetration of the electrolyte into the active material, increasing the utilization rate of the active material and high-current discharge performance.