Comparison of basic characteristics of lithium battery and lead acid

The cycle life of lead-acid batteries is about 300 times, and the remaining 60% capacity is the end of life. The lithium iron phosphate monomer in the lithium battery has a cycle life of more than 2000 times, and after PACK, it also has a cycle life of more than 1500 times; the ternary lithium monomer also has a cycle life of more than 500 times, and the lithium battery has 80% capacity remaining as the end of life. In contrast, the life of lithium batteries is about 5 times that of lead-acid batteries, which is also a particularly big advantage of replacing lead-acid batteries with lithium electricity. Comparison table of lithium battery and lead-acid battery ②Energy density, weight, energy density. Taking 12V7Ah as an example, the lead-acid battery is about 2.5Kg; while the lithium battery 12V7Ah is only about 0.5Kg, that is to say, the weight of the lead-acid battery is about 5 times that of the lithium battery with the same number of wh. In terms of volumetric energy density. Take the lead-acid housing of 12V7Ah as an example. With the same housing size, lead-acid can only achieve about 12V7Ah, while the lithium battery can hold 21 18650 batteries, and the lithium iron phosphate can achieve 4 strings and 5 parallels, ternary lithium It can do 3 series and 7 parallel, the maximum capacity is 12V23Ah. In other words, in the case of the same casing volume, the energy of a lithium battery is more than three times that of a lead-acid battery. Lightweight and small in size, this is another big advantage of lithium batteries compared to lead-acid batteries. The 12V7Ah lead-acid casing can hold 21 18650 batteries. ③Environmental impact Lead-acid batteries are polluted by heavy metals and are quite harmful to the environment. This is one of the reasons why the price of lead-acid batteries has been increasing in recent years. Lithium batteries are new energy batteries, which can also be recycled and used without pollution to the environment. This is also the reason why people strongly recommend it. ④Safety. Lead-acid batteries are resistant to overcharging and their safety is relatively high. The safety and stability of lithium battery packs are relatively low. Under abnormal conditions such as overcharge, overdischarge, short circuit, and high temperature, the power of lithium battery packs is particularly great. Have to rely on BMS to control and protect its stability. Insufficient safety and stability is a disadvantage that cannot be ignored in the process of replacing lead-acid batteries with lithium batteries. Lithium-powered vehicle battery catches fire. ⑤Price Lead-acid battery has a long history and mature technology in batches. The price is about 0.5 yuan/Wh. The lithium iron phosphate battery pack is currently about 2 yuan/Wh, and the current price of the ternary lithium battery pack is about 1.5 yuan/Wh. The current price of lithium batteries is about 3 to 4 times that of lead-acid batteries. This is also a flaw in some products that consider price. Lithium batteries cannot replace lead-acid batteries. However, the cost of power lithium batteries retired from power vehicles will be lower, about twice that of lead-acid batteries, or even lower, and they are slowly approaching the price of lead-acid batteries and are slowly being accepted by people. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Analysis of the types of high-energy batteries