Three internal cause of the battery failure -Power Kingdom

Part of the internal cause of the battery failure is a tautology. 1. Lead powder mainly capacity of lead-acid battery inspection, the decision is the capacity of active substances. And lead oxide is one of the main lead-acid battery active substances in the raw material. To some extent, the stand or fall of lead powder directly affects the capacity and life of the battery. Due to Pb can be oxidized to PbO, therefore, is the main ingredient in lead powder PbO and Pb, and PbO accounted for the vast majority of, and PbO is converted to active substance material plays the leading role. The so-called oxidation degree, is refers to the lead powder of PbO percentage of weight. Oxidation through high and low, the battery will have a big impact. Oxidation degree is high, can be caused with sulfuric acid density is high, although the early stages of the battery capacity will increase, but with plate also can produce crack, peeling, etc. Bad phenomenon. Conversely, oxidation degree is low, prone to paste loose when and creams, poor adhesion characteristics, at the same time, the plate is easy to bending deformation. Therefore, control of lead oxide oxidation degree within the scope of the specified process, meet the technological requirements, is extremely important. 2. Alloy factors in general, maintenance-free battery use sheeting material is Pb - Ca— Sn alloys. Ca can change the strength of the plate grid, the addition of Sn, made of alloy on the casting performance has been improved, and raised the sheeting hydrogen evolution over potential, improve the corrosion resistance capacity of plate grid. In general, the content of Ca in 0. 04% ~ 0. Between 1% and Sn in 0. Between 8% ~ 2%. Wen-bing Yang, 21st century · sflep cup after test, it is concluded that the Ca - 0. And Sn - 084% 1. 3%, or Ca - 0. And Sn - 075% 1. 42% [ 2] , the ratio of the two is suitable for production. However, different manufacturers, for Ca and Sn ratio is not necessarily the same. We can not simply judge who is right who is not appropriate, but, there is always a best proportion of Ca and Sn, to prolong the service life of battery for as long as possible. 3. The effect of acid concentration to note the proportion of liquid sulfuric acid, I think it is a very important parameter. The current domestic production of battery manufacturers, in the choice on the proportion of liquid sulfuric acid is not the same, some on the high side. Note the proportion of liquid sulfuric acid directly affects the early stages of the battery capacity, and affect the service life of the battery, the proportion of high sulfate, you can get a higher initial capacity. Chose the high proportion of sulfuric acid, the early stages of the battery capacity is high, can satisfy the requirement of the discharge within a certain amount of time, seemed to show the design of the battery capacity is far beyond the rated capacity, but increased the board gate corrosion. This is why some batteries after put into use in a few short years, the battery is the lack of an overall capacity. Personally, when the battery into the electrolyte density after more than 1. 300 g/cm3, will significantly shorten the service life of the battery. Passing here is, therefore, when in comparing different manufacturer of battery capacity, especially in the early capacity, on the basis of qualified, the highest capacity is not necessarily the longest service life and the lowest capacity is not necessarily the worst. For example, when 10 hr discharge, released when the battery capacity is more than 120% of the rated capacity, seemingly battery capacity is very rich, but on the cycle life, perhaps within a few years the battery will fail.