The main functions of the AGM separator in the battery

Absorbing glass fiber separator ( AGM battery separator ) is an important part of valve regulated lead-acid battery. Its performance and dosage directly affect the technical performance of the battery, especially the service life of the battery.

    The main functions of the separator in the battery:   

(1) As the carrier of sulfuric acid in the battery, the AGM separator, together with the electrode plate, bears all the sulfuric acid required to adsorb the rated capacity of the battery in the lean solution state. This requires that the separator itself has sufficient capacity to absorb sulfuric acid, and at the same time, sufficient space should be reserved for the separator and appropriate amount of separator should be selected during battery design.

(2) In order to improve the sealing reaction efficiency of valve regulated sealed lead-acid battery, the AGM battery separator shall be able to provide sufficient oxygen channel when the battery is charged, so that the oxygen released from the positive plate can smoothly pass through the AGM separator to the negative plate, and be combined into water to achieve oxygen circulation. This requires that the AGM separator have a reasonable microporous structure, and also requires that the appropriate acid absorption saturation of the separator be determined during battery design.

(3) In valve regulated sealed lead-acid batteries, the AGM battery separator can prevent the active substance of the plate from falling off and the plate from deforming, thus prolonging the service life of the battery. This requires that the separator itself has a small shrinkage after injecting sulfuric acid, and also requires that the separator be in a high pressure state during battery design.

(4) The resistance of the separator and the resistance formed at its contact with the electrode plate are part of the internal resistance of the battery, which requires the AGM separator to have a low resistivity. It also requires the design of the battery to keep the separator in a high pressure state, so that the separator can closely contact the electrode plate and reduce the resistance formed at its contact.

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