Lead-acid battery, as one of the earliest widely used battery types, has the advantages of low price, simple maintenance, high reliability, and high current discharge, so it has been widely used in the field of electric bicycles. However, with the continuous development of science and technology and the increasing demand for environmental protection and safety, lead-acid batteries have gradually revealed some shortcomings. Lead-acid batteries due to the relatively large volume, low energy density, limited storage of electric energy, need to be replaced frequently, can not meet the needs of long-distance riding, short service life and other characteristics, and lithium batteries in lightweight, endurance and energy density is better than lead-acid batteries, so lead-acid batteries are gradually replaced by cost-effective lithium batteries.
The main reason for choosing lead-to-lithium batteries is that lithium batteries have many advantages compared with traditional lead-acid batteries.
1. Weight and volume Lithium batteries are usually lighter and smaller than lead-acid batteries. Under the same power, the weight of lithium batteries is usually only half or less than that of lead-acid batteries, which makes lithium batteries have obvious advantages in areas requiring lightweight design;
2. Energy density The energy density of lithium batteries is higher than that of lead-acid batteries, which means that the same volume of lithium batteries can store more electricity and provide longer battery life for the equipment;
3. Service life Lithium battery durability is strong, slow consumption, charging and discharging more than 2500 times, and no memory, the general life is 4-5 years. Lead-acid batteries are generally deep charge and deep discharge less than 400 times, there is memory, and the life span is about two years;
4. Charge and discharge performance Lithium batteries can achieve a faster charging speed, improving the availability and efficiency of the equipment, while lead-acid batteries charge slowly and take longer to be fully charged;
5. The operating temperature range of lithium batteries is wider than the operating temperature range of lead-acid batteries, which can be used in high and low temperature environments at different temperatures. Lithium batteries can work at -25~55 ° C, reaching 70% of the electricity, while lead-acid batteries can only work at 10~40 ° C, and can not work at -25 ° C;
6. Self-discharge rate The self-discharge rate of lithium batteries is lower than that of lead-acid batteries, and lithium batteries have a lower self-discharge rate, which can save electric energy for a longer time to ensure that the equipment can be used immediately when needed. Acid batteries have a large loss of power when they are not used for a long time and need to be re-charged before they can be used.
In summary, the main reason for choosing lead-to-lithium batteries is that lithium batteries have many advantages such as higher energy density, longer service life, lighter weight, faster charging speed and lower self-discharge rate, which can meet the needs of modern equipment for battery performance and bring better use experience and results.
