Which is better for electric car, Lithium battery or lead-acid battery?

　 Lithium batteries are better. Lithium battery whether volume ratio of energy, or the weight ratio of the energy lithium battery more than three times higher than the lead-acid battery. Lithium batteries are smaller and lighter. It has long cycle life.

　Running far away, the key is to look at the battery capacity. It doesn't make sense to say who is far away.

　For example, all are 48V20AH, lithium battery and lead acid are basically the same, because the capacity is the same, but the lithium battery will be lighter, so it can be a little farther than lead acid.

　But if the lithium battery is 48V10AH and the lead acid is 48V20AH, it is definitely far from lead acid, needless to say. To put it simply, whoever has a large capacity and runs far away, the advantage of lithium battery over lead acid is light, high current discharge, and everything else is the same.

　Lithium battery You can search for the security after connecting large capacity? Cost feasibility? Why mobile phone batteries will explode lead-acid batteries, although bulky but more stable than lithium batteries! The cost is basically accepted! Stability, safety and cost are higher than lithium! As long as the battery is either lithium or lithium, the lead-acid battery is a heavy pollution product!

　First, the current consumption of lead-acid batteries for electric vehicles in the market is still higher than that of lithium batteries. The reason is that the current cost of lithium batteries is still relatively high. Therefore, in the design of the existing "lithium electric car" products, the capacity allocation of the lithium battery is reduced to reduce the implementation cost of the whole vehicle, and this makes the existing "lithium electric car" product model too singular.

　Lead-acid batteries and lithium batteries cannot be simply described as good or bad, and they are suitable for different needs. At present, most of the lithium-ion products on the market are "electric bicycles" and the duration is not very far. However, the four-wheeled electric vehicles and the four-wheeled electric scooters are more suitable for "lead-acid batteries". .

　Second, lithium ions mainly rely on lithium ions to move between the positive and negative electrodes to work. During charge and discharge, Li+ is intercalated and deintercalated between the two electrodes: when charging the battery, Li+ is deintercalated from the positive electrode, and the electrolyte is embedded in the negative electrode, and the negative electrode is in a lithium-rich state; Generally, a battery containing a lithium element as an electrode is used, and at present, the most negative electrode is graphite. Compared with lead-acid batteries, lithium batteries have the advantages of light weight, large specific capacity, long cycle life, etc. It is used as an electric power source for electric vehicles in the elderly. It is not only lightweight and portable, but also helps the whole vehicle. It has "lightweight and simple" design.

　Third, the electrode of the lead-acid battery is mainly made of lead and its oxide, and the electrolyte is a sulfuric acid solution. When the lead-acid battery is charged, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In the discharge state, the main components of the positive and negative electrodes are lead sulfate.

　Fourth, the two batteries are all energy storage devices, and the others are different. Lead-acid batteries are safer and cheaper, but the energy density is lower than that of lithium batteries, so lead-acid batteries are larger. At this stage, the research on battery (storage energy) technology has not yet made a breakthrough, that is, before the "low-cost, high-performance" battery has not been put into commercial application, the existing lead-acid battery and lithium battery can be used. The excellent characteristics are combined to transform and upgrade, as the main research topic in the current period. I believe this will have a clearer direction for the development of the elderly electric scooter and even the entire electric scooter industry.

　General lead-acid batteries are for electric vehicles. Mainly because of its high cost performance.

　If you want to say the endurance, the other conditions are exactly the same, the battery capacity is the same, it may be a little better lithium battery, why, because the lithium battery is lighter, the whole car is lighter, of course, run farther.

　But I still recommend lead acid. The main reason is:

　First, it is cheap. In general, a group of lead acid is only a few hundred pieces, a group of lithium batteries, and more than a thousand or so nearly a thousand.

　Second, security. I still remember the woman who was riding a lithium battery electric car in Nanjing in the previous year. Because the weather was too hot, the lithium battery explosion behind the seat, the news of the ass frying flowers?

　Third, lead acid is enough. The current lead acid is also available for five or sixty kilometers, which is enough for the family to use. Lithium battery is really unnecessary.

　Usually, the lead-acid battery pack weighs 16-30 kg and has a large volume. The lithium battery generally weighs 2.5-3.0 kg and has a relatively small volume, so it is easy to ride and easy to carry. From the quality point of view, the quality of the two is difficult to define, but consumers can buy a good quality battery produced by a regular manufacturer according to their actual needs.

　The cost of the main material such as the positive electrode material, the negative electrode material, the current collector, the separator, and the electrolyte of the lithium battery is much higher than that of the lead-acid battery. The assembly materials and external circuitry of lead-acid batteries are extremely low cost.

　Due to the manufacturing process, the labor cost of the lithium battery is relatively large. In the manufacturing cost, the labor cost of the lithium battery accounts for more than 40%, and the labor cost of the lead-acid battery is generally 10% to 20%.

　The mechanical equipment used in the production of lithium batteries is expensive, the value is high, and the depreciation loss of mechanical equipment is large. Most processes in lithium batteries are irreversible, and lead-acid batteries are reversibly repaired and reused. The recovery value of lead-acid batteries after use is above 40%, while the recovery value of lithium batteries is almost zero.

　Lithium batteries are more than three times higher than lead-acid batteries, regardless of volumetric energy or weight-to-weight energy. Lithium batteries are smaller and lighter. Long cycle life. The cycle life of lithium batteries used in electric vehicles is generally more than 800 times. The lithium batteries using lithium iron phosphate cathode materials can reach 2000 times, which is 1.5 to 5 times higher than lead-acid batteries. This greatly reduces the cost of using the lithium battery, prolongs the service life and improves the ease of use. Has a wide range of charging power. This is a unique advantage of lithium batteries. When necessary, the charging time can be controlled from 20 min to 1 h, and the charging efficiency is over 84%. Based on further technological innovation, this feature will be better played.

　The current lithium battery energy density is generally 200~260wh/g, lead acid is generally 50~70wh/g, then the weight energy density lithium battery is 3~5 times of lead acid, which means lead in the same capacity. The acid battery is 3 to 5 times that of the lithium battery, so the lithium battery dominates the weight of the energy storage device.