How to choose an electric car battery Explain the difference between lead-acid and lithium battery

There are too many brands and styles of electric vehicles, especially the batteries, which are both lead-acid and lithium batteries. I don't know which battery to choose. This problem has become a problem for many consumers. In response to the above question, the author visited several electric vehicle sales markets and found that almost every one has electric vehicles equipped with lead-acid and lithium batteries. There are so many styles of each, which is indeed dazzling. Subsequently, the author consulted with Xupai Battery, a global leading brand of high-quality electric vehicle batteries and one of the world's three largest electric vehicle battery suppliers with more than 20 years of experience in electric vehicle battery production. According to Xupai, there are many electric vehicles on the market, including motorcycles, bicycles, and foldable ones. There are 36 volts, 48 u200bu200bvolts, 60 volts, etc., and consumers have to choose according to their own situation and personal preferences. For shorter driving distances and flat roads, you can choose a battery pack with a lower voltage and a lighter body; for longer driving distances, and you want to take people or climb hills, you must choose a battery pack with a higher voltage and a relatively stable body. So, what is the difference between lead-acid batteries and lithium-ion batteries? Based on the relevant experience of Xupai battery experts, the author summarizes several differences between lithium-ion batteries and lead-acid batteries, hoping to provide consumers with reference: 1. Durability: lead-acid batteries are generally deep-charged and discharged within 400 times. Memory, life span is about two years. If you are using a maintenance-free lead-acid battery, it should be noted that the battery loses less water, and it is generally not necessary to add distilled water during use. Lithium-ion batteries have strong durability, slow consumption, charge and discharge more than 500 times, and have no memory. The general life span is 45 years. According to Xupai battery experts, in terms of durability, the battery has good vibration resistance. The fully charged battery is safe and fixed. It vibrates for 1 hour with an amplitude of 4mm and a frequency of 16.7Hz. There is no leakage, no battery expansion or rupture. , The open circuit voltage is normal; the overcharge resistance is good, 25 degrees Celsius, the fully charged battery 0.1CA charge 48 hours, no leakage, no battery expansion or rupture, the open circuit voltage is normal, the capacity retention rate is above 95%; high current resistance Good performance, the fully charged battery is discharged for 5 minutes at 2CA or 5 seconds at 10CA, no conductive part is fused, and no appearance is deformed. 2. In terms of volume and quality: the general lead-acid battery pack weighs 16-30 kilograms and is relatively large; lithium-ion batteries are generally 2.53 kilograms and relatively small in size, so they are light and easy to ride. As far as quality is concerned, it is difficult to define which is better and which is bad. Consumers can purchase good-quality brand batteries produced by regular manufacturers according to their needs. 3. In terms of price and warranty period: The mainstream battery on the market is currently 48 volts. If replaced, the lead-acid battery is about 450 yuan and the warranty period is 1 year; the price of lithium ion batteries is relatively expensive, about 1,000 yuan, but the warranty period For two years. 4. Driving kilometers: the same 48V battery, when fully charged, both lead-acid batteries and lithium-ion battery electric vehicles can travel 30-40 kilometers. The speed is importantly dependent on the size of the motor used. 5. Battery capacity: lead-acid battery capacity is about 20 amps; lithium ion battery capacity is 810 amps. 6. Environmental protection: After the state promulgated the 'Access Conditions for the Storage Battery Industry' in 2012, the lead-acid industry has undergone reorganization and integration, and most manufacturers have adopted internally chemically produced cadmium-free and arsenic-free green production, which is more environmentally friendly and energy-saving, only in the recycling process , If the method is improper, it may cause pollution; lithium-ion batteries are relatively greener in terms of production and recycling.