Which is better, lithium battery or lead-acid battery electric vehicle?



Lithium batteries are better. Whether it is volume specific energy or weight specific energy, lithium battery is more than three times higher than lead-acid battery. Lithium batteries are smaller and lighter. Long cycle life.            The key to running is the battery capacity. It doesn't make sense to say who is far away alone.            For example, they are all 48v20ah. Lithium batteries are basically the same as lead-acid batteries, because they have the same capacity, but lithium batteries are lighter, so they can be a little farther than lead-acid batteries.            But if the lithium battery is 48v10ah and the lead acid is 48v20ah, then the lead acid is far away, needless to say. In short, the advantage of lithium battery over lead-acid battery is that it is light and can discharge large current. The others are the same.            Can you search the safety of lithium battery after connecting large capacity in series? Cost feasibility? Why do cell phone batteries explode? Lead acid batteries are bulky but more stable than lithium batteries! Cost is basically accepted! Stability, safety and cost are higher than lithium battery! As long as the battery is lithium battery or lead-acid battery is a heavy pollution of goods!            1、 At present, the amount of lead-acid battery in electric vehicle battery is still higher than that of lithium battery, because the cost of lithium battery is still relatively high. Therefore, in the design of existing "lithium tram" products, the capacity configuration of lithium battery is mostly used to reduce the implementation cost of the whole vehicle, which makes the existing "lithium tram" product model too single.            Lead acid battery and lithium battery can't be considered as good or bad, they have their own advantages and disadvantages, and adapt to different needs of people. At present, most of the lithium battery products on the market are "motorcycles" and the range is not very long. However, such as four-wheel electric vehicles and four-wheel electric scooters for the elderly, which are relatively long range, are still suitable for "lead-acid batteries" at present.            2、 Lithium ion mainly depends on the movement of lithium ion between the positive and negative electrodes. In the process of charge and discharge, Li + is embedded and de embedded between the two electrodes in a round-trip way: in the charge cell, Li + is de embedded from the positive electrode, and is embedded into the negative electrode through the electrolyte, and the negative electrode is in a lithium rich state; in the discharge, it is the opposite. Generally, lithium containing materials are used as the electrode of batteries. At present, graphite is the most widely used anode. Compared with lead-acid battery, lithium battery has the advantages of light weight, large specific capacity, long cycle life and so on. As an electric power supply for the elderly, it is not only light, portable and convenient for charging, but also conducive to the "lightweight and simplified" design of the vehicle products.            3、 The electrode of lead-acid battery is mainly made of lead and its oxide, and the electrolyte is sulfuric acid solution. In the charged state of lead-acid battery, the main component of positive electrode is lead dioxide, the main component of negative electrode is lead; in the discharged state, the main component of positive and negative electrodes are lead sulfate.            4、 Apart from being energy storage devices, the two kinds of batteries are different. Lead acid battery is safer and cheaper, but its energy density is lower than lithium battery, so its volume is larger. At present, the research on battery (energy storage) technology has not made a breakthrough, that is, before the "low-cost, high-performance" battery has not been put into commercial application, the excellent characteristics of the existing lead-acid battery and lithium battery can be combined for transformation and upgrading, as the main research topic for the present and for a period of time in the future. It is believed that this will have a clearer direction for the future development of the elderly electric scooter and even the whole electric scooter industry.            Lead acid batteries are generally used in electric vehicles. Mainly because of its high cost performance.            If we want to talk about the endurance, other conditions are the same, and the battery capacity is the same, it may be that the lithium battery is a little better. Why? Because the lithium battery is lighter, the weight of the whole car is lighter, of course, it runs far away.            But I recommend lead acid. The main reasons are:            1、 Cheap. Generally speaking, a group of lead-acid costs only a few hundred yuan, and a group of lithium batteries costs more than one thousand and nearly two thousand yuan.            2、 Safety. Remember the year before last when the woman in Nanjing rode a lithium battery electric car, because it was too hot, the lithium battery in the back of the car seat exploded, blowing up her butt?            3、 Lead acid is enough. Now lead-acid has a general endurance of 50 or 60 kilometers, enough for home use. Lithium is really unnecessary.            In general, the weight of lead-acid battery pack is 16-30 kg, with a large volume; while the weight of lithium battery pack is generally 2.5-3.0 kg, with a relatively small volume, so it is easy to ride and carry. From the quality point of view, it is difficult to define the quality of the two, but consumers can buy batteries with good quality from regular manufacturers according to their actual needs.            The cost of cathode material, anode material, collector, separator, electrolyte and other main materials of lithium battery is much higher than that of lead-acid battery. However, the cost of assembly auxiliary materials and external circuit system of lead-acid battery is very low.            Due to the manufacturing process, the labor cost of lithium battery is relatively large. In the manufacturing cost, the labor cost of lithium battery accounts for more than 40%, while the labor cost of lead-acid battery is generally 10% - 20%.            The mechanical equipment used in lithium battery production is expensive and valuable, and the depreciation loss of mechanical equipment is large. Most of the production process of lithium battery is irreversible, while lead-acid battery is reversible repair and reuse. The recovery value of lead-acid battery is more than 40%, while that of lithium battery is almost zero.            Whether it is volume specific energy or weight specific energy, lithium battery is more than three times higher than lead-acid battery. Lithium battery volume is more