2results about How to "Increase charging current" 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 invention relates to a battery charging method and system, belonging to the field of battery charging technology. It includes a constant current charging stage and a constant voltage charging stage. The battery charging method includes: obtaining the highest temperature T1 during the constant current charging stage; calculating the target control temperature T2 of the battery during the constant voltage charging stage, the calculation formula for the target control temperature being: [formula missing], where [value missing] is a trade-off parameter between charging speed and cell temperature, 0 < [value missing], and [value missing] is the current charging ambient temperature; when the battery is in the constant voltage charging stage, the temperature of the cell is controlled so that the cell temperature T satisfies the following relationship: T2 ≤ T ≤ T1. This invention increases the average temperature of the cell during the constant voltage charging stage by heating the cell, reduces cell polarization, increases the charging current during the constant voltage charging stage, and improves the charging speed.