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Lead acid batteries have been a very mature type of battery product with decades of development since their invention. However, due to its own limitations and material defects, lead-acid batteries will be phased out in the market sooner or later. Let's take a look at the reasons below.

1. Decomposition of raw materials from lead-acid batteries

The positive and negative electrode plates are composed of a grid and active substances. The critical component of the positive active substance is lead dioxide, while the critical component of the negative active substance is sponge like lead.

Partition board: It is made of PVC, PE plastic, microporous rubber, or glass fiber, etc. Important use: to guard against short circuits between positive and negative electrode plates; Enable the smooth passage of positive and negative ions in the electrolyte; Slow down the detachment of active substances from the positive and negative electrode plates, and guard against damage to the positive and negative electrode plates due to vibration.

Electrolyte: Automotive batteries use an electrolyte density of 1.280 Dilute sulfuric acid at 01g/cm3 (25 ℃). The purpose of electrolyte: participating in the electrochemical reactions of positive and negative electrode plates; Conducted current.

The shell (battery compartment, cover) of a battery is made of PP plastic, rubber, and other materials, and is a container for storing positive and negative electrode plates and electrolyte.

Other: In addition to the critical components mentioned above, the battery also has components such as connection strips, terminals, poles, and electric eyes.

When scrapping batteries, it is necessary to discharge waste sulfuric acid solution, which contains sulfuric acid, lead sulfate, etc. Solid waste contains lead, lead dioxide, lead sulfate, cadmium, arsenic, etc. The pollution of sulfur dioxide poses a threat to human health. Sulfuric acid is the electrolyte in batteries, which releases sulfur dioxide when fully discharged. Sulfur dioxide combines with water vapor to form acid mist or rain. The hidden harm of acid rain to human society is much greater than its explicit harm, indicating that the harm of sulfuric acid batteries is quite significant. And when the concentration of sulfur dioxide is 260 μ At g/m3, coniferous trees can die within a few hours. Acid rain is extremely destructive to soil. It can destroy calcium and other metals in soil, form soluble salts and flow into Rivers and Lakes. The concentration of sulfur dioxide in the atmosphere is basically proportional to the incidence rate of respiratory system. Once sulfur dioxide is oxidized into acid mist, its toxicity is 10 times greater than that of sulfur dioxide.

Senior officials from the World Health Organization believe that lead poses the greatest threat to children in the environment. Children with blood lead levels greater than 100 μ G/L may cause harm to children. Lead can cause brain poisoning, disrupt the function of suppressing impulses, and the occurrence of some violence in society may be related to lead pollution. Medical research claims that mild lead pollution can cause brain damage, decreased intelligence, and underdeveloped nervous system in children, while severe lead pollution can lead to coma, spasms, and death.

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