Lithium battery pack and lead-acid battery comparison, do you know the point? Lead-acid battery VS lithium battery pack advantages and disadvantages, has been the industry's continued concern. Whether it is battery brands, styles or brands are diverse, Lead-acid batteries and lithium batteries occupy the dominant position. Below, we will introduce the advantages and disadvantages of lithium batteries versus lead-acid batteries.
First, the difference between lithium battery pack and lead-acid battery
Lithium battery: It is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution.
Battery: It is a kind of battery. Its function is to store limited electric energy and use it in a suitable place. Its working principle is to convert chemical energy into electric energy.
Second, from the perspective of weight energy density, volumetric energy density, service life, price, applicability, charging, national policy, environmental protection, etc.
1 weight energy density
The lead-acid battery pack weighs 16-30 kg and has a large volume; while the lithium battery weight is generally 2.5-3.0 kg, and the volume is relatively small. The current lithium battery pack energy density is generally 200~260 wh/g, lead acid is generally 50~70wh/g, then the weight energy density lithium battery is 3~5 times of lead acid, which means that the lead acid battery is 3~5 times that of the lithium battery under the same capacity, so the energy storage device is lighter. 1. Lithium battery packs have an absolute advantage.
2 volume energy density
The volume capacity density of a lithium battery pack is usually about 1.5 times that of a lead-acid battery. Therefore, in the case of the same capacity, the lithium battery is about 30% smaller than the lead-acid battery.
3 service life
Lithium iron phosphate cathode material lithium battery can reach 2000 times, 1.5 to 5 times more than lead-acid batteries. This greatly reduces the use cost of lithium batteries, prolongs the service life and improves the convenience of use. The number of cycles of lead-acid batteries is usually Only 300~350 times, so the service life of lithium battery is about 3-6 times that of lead-acid battery.
4 price
At present, the price of lithium batteries is more expensive than lead acid, about 3 times, but combined with the analysis of service life, the same cost is still used, the lithium battery pack is still used longer.
5 applicability
Lithium battery packs are slightly worse than lead-acid batteries because of their safety. Therefore, various safety precautions must be taken during use, such as preventing damage to lithium batteries caused by external forces or accidents, as this may cause fire or explosion; The temperature applicability is also very good, so in other aspects of adaptability, lithium batteries are no less inferior to lead-acid batteries.
6 national policy
Lead-acid batteries are quite harmful to the environment because of the production process or discarded batteries. Therefore, from the perspective of national policy, it has restricted the reinvestment of lead-acid batteries, or restricted the use of lead-acid batteries in some areas. In the future, the trend of replacing lithium-ion battery packs with lead-acid batteries will become more apparent, and the progress will gradually increase.
7 charging speed
Lithium batteries have a wide range of charging efficiency, which is a unique advantage of lithium batteries. When needed, the charging time can be controlled at 20min~1h, and the charging efficiency is over 84%. The lead-acid battery does not have this performance.
8 environmental performance
Lithium iron phosphate battery pack does not contain any heavy metals and rare metals, non-toxic, no pollution in production and use, in line with European RoHS regulations, is a green battery. However, there is a large amount of lead in lead-acid batteries. If it is disposed of improperly after disposal, it will still cause secondary pollution to the environment.
Third, the defects of lithium batteries
● The same voltage lithium battery with the same capacity is about twice as expensive as the lead-acid battery.
●Because the composition of lithium-ion battery is very active, if it is used incorrectly, there will be a major accident of electrolyte decomposition, burning and even explosion.
● The battery performance is obviously deteriorated at low temperature, the discharge platform is lowered, the output power is reduced, and the available power is attenuated.
Summary: 'The natural selection, the survival of the fittest', obviously the battery can not meet the increasing demand of our public on the basis of lithium battery pack. The development of lithium battery industry is very rapid, and the field of application is more and more extensive. In the battery market, traditional lead-acid batteries have gradually been replaced by new performance lithium batteries.
