Irreversible sulphation, referred to as sulphation. When the lead-acid battery is discharged, the positive and negative plates produce a combination of lead sulfate. Lead sulfate is a poorly soluble, non-conductive substance under normal conditions. The leaching of lead sulfate formed by the battery after discharge is relatively small. When charging, it is relatively easy to dissolve and reduce to lead under the action of electricity. If used improperly, it is often insufficiently charged, dehydrated, over-discharged, etc. When coarse and hard crystals are formed, it is difficult to reduce them to lead by a general method, so it is called irreversible sulfation. On the one hand, it can block the contact of sulfuric acid with other active substances due to sulfation. Reacts: On the other hand, the amount of active material is reduced, which can cause the battery to fall easily, and in severe cases, the battery life will be terminated. 2. Exfoliation of active substances When we repair used batteries, some batteries are filled with water and some reddish brown liquid flows out from the water injection hole. It is the active substance that falls off. The reasons for the falling off of the active substance are as follows: 1. The battery is affected by external force, such as vibration. , beats and so on. 2, α-PbO2.βPbO2 variant model. αPbO2 is the active material skeleton, when the battery is charged and discharged, a part of α-PbO2 is converted into β-PbO2, resulting in softening and shedding. 3, with the cycle, activity The material is gradually crystallized from the amorphous state, that is, the crystallinity increases, the number of hydrated polymer chains decreases, the gel pressure resistance increases, the electrical contact between the grains deteriorates, and the active material falls off. 4. It is also believed that with charging And the discharge continues, the active material forms a number of dense agglomerates. When there is insufficient connection between the agglomerates, the active material will fall off and the battery will fail. 3. Battery voltage The potential difference between the positive and negative poles of the battery is called the voltage of the battery. It is generally measured with a multimeter. During the battery repair process, the voltage has three manifestations: the first type is the no-load voltage, also known as the open circuit voltage, that is, the battery is not charged. Battery voltage measured without load: The second type is the load voltage, which is the battery voltage measured during a certain period of battery discharge. The third type is the line voltage, which is measured at a certain time during the charging process. The voltage, understand three voltage measurement methods, to determine whether the battery is open or short circuit; battery internal resistance calculation has important significance. 4. Battery capacity The capacity of the battery is an important indicator to measure the performance of the battery. It is generally expressed in ampere-hour. The general term for discharge time (hours) and discharge current (amperes), ie capacity = discharge time × discharge current. The actual capacity of the battery depends on The amount of active material in the battery and the utilization rate of the active material. The more the active substance is, the higher the utilization rate of the active material, and the larger the capacity of the battery. The smaller the capacity. Best Insecticide,Ddvp Insecticide,Insecticide Abamectin,Imidacloprid Insecticide HENAN BONSIN CHEMICAL CO.,LTD , https://www.bosinchem.com
Commonly used nouns in battery repair process
Irreversible sulfation