Particular factors causing battery failures come out.Lead powder
The lead-acid storage battery is mainly capacity, and the capacity is active. The lead powder is the most important raw material in the active substance of the lead-acid battery. To a certain extent, the quality of lead powder directly affects the capacity and life of the battery.
Since PB is very easy to be oxidized into PBO, the main components in lead powder are PBO and PB, and the PBO dominant, and the PBO is also converted into a substance that acts as a active material.
The so-called oxidation is to refer to the weight percentage of PBO in the lead powder. The oxidation is too high and too low, and it will have a big impact on the battery. The oxidation is high, as in the result of the highlightening of the sulfuric acid density, the initial capacity of the battery will increase, but accompanied, the plate also produces a crack, peeling and other incompatis. Conversely, the oxidation is low, and the characteristics of paste loose and adhesiveness are easily generated during and paste, and the plates are also easily deformable.
Therefore, the control of lead powder oxidation is intended to meet the process requirements in the specified process.
2. Factors of alloy
In general, the grid material used by the maintenance-free battery is a PB-CA-Sn alloy. The CA can change the strength of the grid, the addition of SN, so that the alloy has improved in casting performance while increasing the hydrogen-resistant over-potential of the grid, and improving the corrosion resistance of the grid. In general, the content of CA is between 0.04% to 0.1%, while Sn is between 0.8% to 2%. Yang Wenbing, Xia Peng After testing, CA-0.084% and SN-1.3%, or CA-0.075% and SN-1.42% [2], these two ratios were suitable for production. However, different manufacturers are not necessarily the same for CA and SN ratios. We cannot just judge who is inappropriate, but there is always one of the best proportions of CA and SN, which can extend the life of the battery as much as possible.
3. Effect of acid concentration
For the proportion of hydrocolithic sulfuric acid, I think it is a very important parameter. At present, domestic production of battery manufacturers, which are different from the specific gravity of hydrolysis, and some are high. The high and low of the proportion of hydrocoxi acid directly affects the initial capacity of the battery and affects the battery life of the battery, high sulfuric acid, and the initial capacity will be high. The high-specific sulfuric acid is selected. Although the initial capacity of the battery is high, the requirements for discharging in a certain period of time seem to show that the battery's design capacity is far exceeding the rated capacity, but it has exacerbated the corrosion of the grid. This is why some batteries are in just a few years after use, the battery is inadequate. Personally, when the electrolytic solution after battery changes exceeds 1.300 g / cm3, the service life of the battery will be significantly shortened.
Therefore, it is inciting here that is that when comparing the capacity of different manufacturers, especially the initial capacity, on the basis of qualified, the highest capacity is the longest service life, the lowest capacity is not necessarily the worst. of. For example, when 10 HR is discharged, when the capacity of the battery exceeds the rated capacity of 120%, the seemingly battery capacity is very rich, but in a cycle life, the battery may be invalid in a few years. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
