Detailed explanation of the difference between lithium ion batteries and lead-acid batteries

1. The environmental protection difference between lithium-ion batteries and lead-acid batteries: lithium-ion batteries are environmentally friendly batteries. This can be seen from the country’s strong support for the development of new energy strategies, supporting the development of lithium-ion batteries as new energy electric vehicles for pollution reduction and pollution reduction. Contribution, while the pollution of lead-acid batteries is relatively serious during production, the country is now beginning to control lead-acid batteries and even start to close some lead-acid battery factories to reduce pollution in the area, and there is a new energy subsidy policy for power lithium-ion batteries. 2. Charging difference: Li-ion batteries are normally charged to 4.2V. Li-ion batteries are one of the rechargeable lithium-ion batteries, while lead-acid batteries can be charged up to 2.4V. Generally add water or some maintenance-free lead-acid Batteries, lead-acid batteries VRLA is a kind of battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is sulfuric acid solution. When the lead-acid battery is charged, the important components of the positive and negative electrodes are lead sulfate, and the lithium ion battery is charged. In the state, the positive and negative electrodes are mainly lithium. Lithium-ion battery pack3, voltage is different: the nominal voltage of lithium-ion batteries is 3.7V, which can be assembled in any series or parallel to form lithium-ion battery packs of different voltages; while the nominal voltage of a single-cell lead-acid battery is 2.0V, In China, 6 single-cell lead-acid batteries are often connected in series to form a nominal 12V lead-acid battery, as well as a 24V lead-acid battery. 4. Different energy density: Lithium-ion batteries have high energy density. The specific energy of lithium-ion batteries can now reach 240Wh/kg, and there is still a lot of room for development. It is expected to reach 300Wh/kg by 2020; while the energy density of lead-acid batteries Generally, it is 40WH/KG. Because lead-acid batteries are mature, the energy density of lead-acid batteries cannot be improved. It is expected that the energy density of lead-acid batteries can reach 45Wh/kg by 2020, which shows that there is little room for development. . 5. The weight is different: If the weight of a lithium ion battery is calculated by a 2200mAh 3.7V18650 lithium battery cell, it is generally about 47g, while the weight of the same 2.0V lead-acid battery is about 2.0Kg, that is, the weight of the lead-acid battery It is much heavier than lithium-ion batteries. 6. Discharge is different: Lithium becomes lithium ions when discharging, leaving the anode of the battery and reaching the cathode of the lithium ion battery. Lithium ions move between the anode and the cathode, and the electrode itself does not change. The anode of the lithium ion battery is graphite crystal. , The cathode is usually lithium dioxide, which has high discharge energy, and can also support high-rate 30C discharge when designed; while in the discharge state of a lead-acid battery, the important component of the positive electrode is lead dioxide, and the important component of the negative electrode is lead. Rate discharge. The difference between lead-acid and lithium-ion batteries 7. Different cycle life: battery cycle life is what we call durability. Li-ion batteries are more durable than lead-acid batteries because lithium-ion batteries have more than 500 charge and discharge times, and there is no Memory function, the life of lithium-ion batteries is generally 4 to 5 years; and lead-acid batteries are generally within 400 times of deep charge and deep discharge, with memory, the life of lead-acid batteries is about two years, if you are using maintenance-free lead-acid batteries , It should be noted that the battery loses less water, and it is generally not necessary to add distilled water during use. 8. The price is different: the price of lead-acid batteries is cheaper than lithium-ion batteries. Taking a 12V10Ah battery as an example, the price of a 12V10Ah lithium-ion battery is generally around 115 yuan, while the price of a 12V10Ah lead-acid battery is generally around 55 yuan. , The price of lithium-ion batteries is basically twice the price of lead-acid batteries. During the analysis and investigation of the difference between lithium-ion batteries and lead-acid batteries, it was found that more and more people are now beginning to replace lead-acid batteries with lithium-ion batteries. That is, some customers who liked to use lead-acid batteries are now slowly accepting lithium-ion batteries. , This is also driven by the general environment. In fact, sometimes you can imagine which one is better for lead-acid batteries and lithium-ion batteries with your eyes closed. It just depends on your acceptance. If you don’t believe it, let’s take a look at the following lithium-ion batteries and lead-acid batteries. Compare the advantages and disadvantages of the differences, I hope to inspire everyone. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Li-ion battery charging method and process