2results about How to "Increase liquid absorption" patented technology

This invention relates to the field of battery separators, specifically to a high-heat-resistant, high-absorbency ceramic separator, its preparation method, and its application. The invention introduces hydroxyl-containing polymers into the coating. Because hydroxyl-containing polymers have good affinity for electrolytes, the ceramic separator exhibits excellent liquid absorption performance, thereby effectively improving the cycle performance of the battery cell. Furthermore, by introducing a boron-containing crosslinking agent into the coating, the borate ions in the inorganic boric acid aqueous solution can act as crosslinking agents to form hydrogen bonds with the hydroxyl-containing polymers, resulting in a crosslinking reaction. Additionally, the copolymerization of 4-vinylphenylboronic acid and ethylene glycol diethylene ether in the organic boric acid solution can form a six-membered ring at high temperatures. Therefore, a three-dimensional network structure is formed within the system over a wide temperature range, improving the skeletal strength of the ceramic separator coating and ensuring both high liquid absorption and improved temperature resistance of the ceramic separator.

The utility model discloses a kind of high-temperature-resistant batteries, including positive plate, negative plate and the composite separator being set between positive, negative plate, it is characterized in that, the composite separator includes a group of PE separator, two groups of glass fiber separators and two groups of AGM separators, the utility model is placed in the two ends of composite separator by AGM separator with excellent liquid absorption, there is enough electrolyte around pole plate under the different working conditions of battery, glass fiber separator auxiliary electrolyte distribution, when cooperating with AGM separator, glass fiber separator can assist AGM separator to better adjust the distribution of electrolyte, prevent electrolyte excessive gathering or dry in local area, PE separator is placed in the middle, using its good barrier property, so that electrolyte maintains relatively stable distribution state inside battery, reduce acid stratification phenomenon, improve the service life and performance stability of battery.