Zinc-air battery vs lead-acid battery
Zinc air batteries use activated carbon to adsorb oxygen or pure oxygen in the air as the positive active material, zinc as the negative electrode, and ammonium chloride or caustic solution as the electrolyte. Also known as zinc-oxygen battery. Zinc-air batteries, which are divided into two systems, neutral and alkaline, are represented by the letters A and P respectively, and then the number is used to represent the battery model.
Lead and zinc are often associated with minerals and maintain a high degree of similarity in price trends, so they can be said to be twin brothers in the metal industry. Originally, the difference in the use of the two metals determines that they are not related, but with the rapid development of zinc-air batteries in the near future, the previous difficulties may face an ultimate showdown in the later period.
Zinc-air battery, also known as zinc-oxygen battery, uses activated carbon to adsorb oxygen or pure oxygen in the air as the positive electrode active material, zinc as the negative electrode, and ammonium chloride or caustic solution as the electrolyte. Primary battery. Compared with traditional batteries, especially lead-acid batteries, zinc-air batteries have many advantages.
First of all, green environmental protection is a bright spot, known as the 21st century environmentally friendly new energy. Because zinc-air batteries do not use heavy and toxic heavy metals such as lead, mercury, and cadmium, they have less pollution to the environment, and at the same time, there is no danger of explosion, and they are safe and reliable. Secondly, the cost is low and the energy storage is large. The raw materials are mainly oxygen in the air and cheap zinc, so the materials are easily available. And its capacity is 3-10 times higher than other batteries. For example, a single 300Ah cylindrical zinc-air battery weighs only 0.75kg, while the weight of the same lead storage battery is more than 8kg. Compared with the current mainstream lithium car batteries, data shows that a zinc-air battery weighing 180 kilograms can generate 44 kilowatt-hours of power and have a range of 350 kilometers, while a lithium battery pack with the same power can weigh up to 360 kilograms. Finally, the advantages of charging are outstanding. Most energy storage batteries have the disadvantage of frequent charging, especially lead-acid batteries cannot be deeply discharged for a long time, and the long charging time brings many inconveniences to customers. And some types of zinc-air batteries are not batteries, but use zinc and air to directly generate electricity. Simply put, after the battery is used up, the user only needs to replace the encapsulated zinc powder, and it can be reused, and the replacement time can be completed within 3 minutes.
In 2011, zinc batteries accounted for less than 10% of the total demand for zinc, which did not increase but declined compared with 2005. The main reason is that zinc-containing batteries are not mainstream in the industry. However, as the zinc-air battery industry scales up in the later period, coupled with the continuous innovation of other zinc-containing battery technologies, the demand for zinc in the battery industry may increase substantially. Happening.
Lead-acid batteries are the main downstream demand for lead ingots, and their share in the lead demand structure has been increasing in recent years, maintaining around 80% in 2011. In my country, lead-acid batteries are mainly used in electric bicycles. At present, 97.5% of electric bicycles use lead-acid batteries, but lead-acid batteries have short lifespan and serious environmental pollution. It is reported that in 2011, more than 80% of lead battery companies in the country were shut down or stopped production due to multiple 'blood lead' incidents and environmental protection remediation.
China will invest more than 100 billion yuan in the next 10 years to support the production of energy-saving and new energy vehicles, making China the world’s largest producer of new energy vehicles. However, in the field of new energy vehicle development in my country, the power batteries used in pure electric buses are basically lithium batteries. Lithium batteries are rechargeable batteries. After being assembled in a 12m-class bus, they must be charged at a professional charging station every day. If you use large-flow DC charging, the charging time will take at least more than 3 hours. If you use AC charging It will take at least 5-6 hours. Lead-acid power batteries are currently mainly used in electric bicycles, and the application technology on electric vehicles is still immature. Therefore, in terms of technical prospects, zinc-air batteries will have the upper hand in the new energy vehicle market in the later stage. And as the technology matures, it may indicate that the era of zinc-air batteries has begun.
In China, in 2011, the country’s first zinc-air electric bus was officially off the assembly line. It is reported that this zinc-air battery pure electric city bus can travel about 300 kilometers per charge, with a maximum speed of up to an hour. 80 kilometers, its operating cost is one-third lower than traditional lithium battery electric vehicles. At present, lithium polymer batteries are still popular. In addition, Shenzhen Battery Company is a professional company specializing in Ru0026D, production and sales of lithium polymer batteries. Its lithium polymer battery products have been well received at home and abroad!
This article is organized by zinc-air batteries and lead-acid batteries. More information: www.ace-pow.com
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