Analysis on the factors affecting the life of lead-acid battery by battery separator

Lead battery recovery is a need to pay attention to the question, the question in the collection way is the main point. Battery separators think that third-party efforts can be used to establish a national, standard collection approach. If no firm has the energy to arrange a national standard approach, focus on the existing collection force. Some companies engaged in recycling used batteries have set up their own collection network, but companies with exemplary standards are required to guide them. Therefore, Liu Yanlong called on major lead battery companies to use their own sales channels reasonably, such as exchanging old batteries for new ones, to collect the sold lead batteries and then dispose of them. However, if this kind of lead-acid battery is also a dangerous goods, each distribution point also needs to do certain preparation to reach the recovery conditions, ability to engage in the collection.

Individual collection is more of the economic interests of the collection of waste batteries to whom to dispose of, some recycling companies can be illegal, regenerative there are also some are not qualified, but still in the disposal. This company collected waste batteries can be incinerated in the future to reduce costs; You can also knock off the battery head, throw away the waste acid and lead mud inside, which will also constitute pollution; In addition, the useful plastic, such as plate to some illegal factories to dispose of, the environmental protection method of these factories is not guaranteed, this will constitute secondary pollution, therefore, this can be another primary source of lead-acid battery pollution. Therefore, it is necessary to introduce some enforceable rules to standardize the collection methods.

Factors affecting the life of lead-acid batteries:

The degree of overcharging PE partition, over charging when a lot of gas precipitation, at this time the positive plate active material suffers the impact of gas, this impact will promote the active material fall off; In addition, the positive plate grid alloy is also subjected to severe anodization and corrosion, so the battery overcharge will shorten the service life.

Discharge depth, because the positive active substance of lead dioxide itself is not well combined with each other, lead sulfate is generated when discharging, and it is restored to lead dioxide when charging. The molar volume of lead sulfate is larger than that of lead oxide, then the volume of active substance is expanded when discharging. If one mole of lead oxide is converted into one mole of lead sulfate, the volume increases by 95%. In this way, the repeated contraction and expansion make the mutual binding between the lead dioxide particles gradually relax and easy to fall off. If the active substance of a mole of lead dioxide is only 20% discharge, the degree of shrinkage and expansion is greatly reduced, and the destruction of binding force becomes slow. Therefore, the deeper the discharge depth, the shorter its cycle life.

The life of lead-acid battery is prolonged with the increase of temperature. In the range of 10℃~35℃, each increase of 1℃, about 5~6 cycles, in the range of 35℃~45℃, each increase of 1℃ can extend the life of more than 25 cycles; When the temperature is higher than 50℃, the life of the battery is reduced due to the loss of the negative vulcanization capacity of the separator.

Lead battery occupation shows the appearance of pollution, the first lies in the recovery link, the production link only needs to be controlled in accordance with the needs of environmental protection, the use of internalized technology and other new technology production, usually does not occur pollution appearance. Liu Yanlong, Secretary general of China Chemical and Physical Power Professional Association, said that recovery and regeneration were mentioned in "Occupation Access Conditions for lead Battery", and the collection ways in these processes could also be an important question of pollution caused by lead acid battery regeneration. At present, the main force of domestic lead-acid battery collection is some individual companies, and most of the individual people are engaged in the collection.