4results 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⁺.

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.

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.

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.