Classification of electric vehicle batteries and analysis of their respective advantages and disadvantages

1) Advantages: Lead-acid batteries are cheap and have the characteristics of being repairable. It also has strong anti-hit ability, is hard and resistant to fall, and has a low loss rate. In other words, lead-acid batteries are cost-effective. In addition, lead-acid batteries have higher airtightness and better safety performance. (2) Disadvantages: Lead-acid batteries are large in volume but small in capacity and short in life. Generally, the deep charge is about 400 times, that is, the service life is 2-3 years. 2. Lithium batteries (1) Advantages: Lithium batteries are light in weight and small in size. Compared with lead-acid batteries of the same capacity, its volume is 2/3 of lead-acid batteries, and its weight is about 1/3 of lead-acid batteries. The reduction in weight can increase the endurance of electric vehicles by about 10%. Secondly, the service life of lithium batteries is also longer, about 1.5 times that of lead-acid batteries. (2) Disadvantages: high processing requirements and high cost, leading to high prices of lithium batteries. In addition, lithium batteries have higher requirements for the use environment. What does the battery specification mean? We generally use the combination of battery voltage and capacity to describe the battery specification of an electric vehicle, such as 48V20Ah. Here V is the voltage unit, and Ah is the capacity unit. Generally, a single battery is 12V, so 48V20Ah represents a battery pack composed of four batteries with a capacity of 20Ah in series. Battery specifications directly affect the battery life of electric vehicles. Under the same circumstances, the battery life of 60V20Ah is longer than that of 48V20Ah, which is obvious. So next, when the battery voltage has been determined, let's discuss the impact of battery capacity on battery life. The relationship between battery capacity and battery life. Battery capacity refers to the amount of power stored in the battery. It is one of the important indicators for weighing battery performance, and it is also an important factor affecting the battery life of electric vehicles. Ignoring other factors, the larger the battery capacity, the longer the battery life of the electric vehicle. So, how can we increase battery capacity? To facilitate understanding, we can look at it this way: battery capacity u003d energy density x battery volume. Therefore, to increase battery capacity, we must start with both battery volume and energy density. Due to the limited quality of the electric vehicle, the volume of the battery will not change much, so increasing the energy density is the core method to increase the battery capacity, and there are many factors that affect the energy density, such as positive and negative materials. , The amount of electrolyte, etc. 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 post: Detailed explanation of the advantages and disadvantages of lithium iron phosphate batteries