Lithium battery and lead-acid battery who can stand out

by:CTECHi     2021-07-19

In the comparison of the properties of lithium batteries and lead-acid batteries, the two different types of batteries have their own advantages. With the rapid development of lithium batteries in recent years and the vigorous promotion of national policies, we all think that now is the era of lithium-ion batteries, and traditional batteries such as lead-acid batteries have long been eliminated. If you think so, then you have been deceived. It is still the world of lead-acid batteries, and lead-acid batteries will occupy a solid position at least in the next few years. Lithium battery or lead-acid battery, who will be the leader of the battery industry? 1. Lead-acid battery industry overview: industry technology level and technical characteristics. With the gradual increase in environmental protection verification and the gradual deepening of the implementation of the 'RegulationsAccording to the field of application, my country's lead-acid batteries can be divided into four categories: backup power batteries, energy storage batteries, starting batteries and power batteries. The backup power battery is a storage battery mainly used for communication backup power supply, uninterruptible power supply (UPS), emergency lighting power supply and other backup power supplies. Energy storage batteries refer to storage batteries suitable for solar power generation equipment, wind turbines, and other renewable energy sources. Starter batteries are batteries mainly used for starting, ignition and lighting of automobiles, motorcycles, and fuel engines. Power batteries are mainly used in electric bicycles, electric special vehicles (electric tour buses, golf carts, police cars, forklifts, etc.), low-speed electric passenger cars, hybrid electric vehicles and other electric vehicles as power. 2. Overview of the development of the lithium battery industry: After more than ten years of development, China's lithium battery industry has established a complete industrial chain including lithium mining and selection, material supply, batteries and PACK, and battery recycling. Power lithium batteries are the core components of new energy vehicles, and demand is most clearly driven by the production and sales of new energy vehicles. In recent years, my country's lithium battery industry has developed rapidly, and the production capacity of related companies has continued to expand. At present, there are hundreds of power battery companies in China, and the battery cell market has exceeded 200 billion. Lithium battery energy storage technology has the advantages of clean and efficient, high energy density, good charge and discharge performance, and fast response speed. It has technical and economic advantages in a variety of application fields. It is currently one of the key electrochemical energy storage technology routes developed at home and abroad. One. Among the currently built MW-level electrochemical energy storage demonstration projects in the world, the installed capacity of lithium battery projects accounts for about 50% of the total capacity, far exceeding other energy storage technologies. The market expects higher policy subsidies for the energy storage industry, and the lithium battery industry is expected to rise in the medium and long term. Which is better, lead-acid battery or lithium battery? Compared with lead-acid batteries, lithium batteries have a higher average voltage and higher energy density. In other words, batteries of the same size have more capacity. In addition, lithium batteries are relatively lightweight, easy to carry, and have a relatively long life. In addition, lithium batteries are more adaptable to high and low temperatures, are less affected by temperature, and are more environmentally friendly. Compared with lithium batteries, lead-acid batteries are relatively cheap and more acceptable to the public. In addition, the high-rate discharge performance of lead-acid batteries is better. The most important thing is that the recycling price of lead-acid batteries is higher than that of lithium batteries. From the perspective of battery safety protection, lithium battery packs are usually equipped with a BMS protection board, which can accurately control the state of each cell in the battery pack and directly solve the problem of overcharge and overdischarge from the root cause. Lead-acid batteries also have their own shortcomings, such as heavy metals easily cause environmental pollution; compared with lithium batteries, lead-acid batteries have lower energy density; and their service life is not as good as lithium batteries. Lithium batteries have strong durability, slow consumption, charge and discharge more than 500 times, and have no memory. The general life span is 4-5 years. Lead-acid batteries generally have a memory within 400 times of deep charge and deep discharge, and their life span is about two years. The current mainstream battery on the market is 48 volts. If it needs to be replaced, the lead-acid battery is about 450 and the warranty period is 1 year; the price of lithium batteries is relatively expensive, requiring about 1,000 yuan, but the warranty period is 2 years. The biggest advantage of lead-acid batteries is that they have a wide applicable temperature range. The discharge function is good in a low temperature environment, the body will not explode in a high temperature environment, and the safety performance is high. Another big advantage of it is its low price, thanks to its abundant raw materials and high resource recycling rate. In contrast, lithium batteries have the advantage of high battery energy density, which allows them to open up the market in the field of new energy vehicles that require high endurance. On the whole, because of the high endurance demand characteristics, lithium batteries shine in the application field of new energy vehicles. The development of new energy vehicles in the future and the guidance of national policies will definitely promote the development of the lithium battery industry. Lithium batteries and lead-acid batteries are currently the two most widely used batteries. The energy density of current lithium batteries is generally 200~260wh/g, and lead acid is generally 50~70wh/g. Then the weight energy density of lithium batteries is 3~5 times that of lead acid, which means that under the same capacity, lead Acid batteries are 3 to 5 times that of lithium batteries, so lithium batteries have an absolute advantage in lightening energy storage devices.

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