1. Weight energy density:
At present, the energy density of lithium-ion batteries is generally between 200-260wh/g, and lead-acid is generally between 50-70wh/g. Therefore, the weight energy density of lithium-ion batteries is 3-5 times that of lead-acid batteries. This means that under the same capacity, lead-acid batteries are 3-5 times that of lithium-ion batteries. Therefore, in terms of lightweight energy storage devices, lithium-ion batteries have an absolute advantage.
2. Volume energy density:
The volume capacity density of lithium-ion batteries is usually about 1.5 times that of lead-acid batteries, so under the same capacity, lithium-ion batteries are about 30% smaller than battery volumes.
3. Usage cycle:
The currently popular material systems are ternary and iron lithium. The cycle times of ternary power lithium-ion batteries are usually more than 1000 times, while the cycle times of iron phosphate lithium-ion batteries are more than 2000 times. The cycle times of batteries are usually only about 300-350 times, so the service life of lithium-ion batteries is about 3-6 times that of lead-acid batteries.
4. Price:
At present, lithium-ion batteries are about three times more expensive than lead-acid batteries in terms of price. However, based on the analysis of their service life, if the same cost is invested, the service life of lithium-ion batteries is still longer.
5. Applicability:
Lithium ion batteries have slightly lower safety compared to lead-acid batteries, so various safety precautions should be taken during use, such as preventing external forces or accidents from damaging the lithium-ion battery, as this may cause fire or explosion; At present, the temperature applicability of lithium-ion batteries is also very good, so in other adaptability aspects, lithium-ion batteries are no less than lead-acid batteries.
6. Usage:
Lead acid batteries: used for car start-up, electric vehicle batteries, lithium-ion batteries: used for mobile phones, computers, electric tools, UPS power supplies, etc., and are now also used for electric vehicle batteries.
7. Internal materials:
The positive and negative electrodes of lead-acid batteries are lead oxide, metallic lead, and the electrolyte is concentrated sulfuric acid. The positive and negative electrodes of lithium-ion batteries are lithium cobalt oxide/lithium iron phosphate/lithium manganese oxide, graphite, and organic electrolytes.
8. Security:
The safety of lithium-ion batteries comes from the stability and reliable safety design of the positive electrode material. Lithium iron phosphate completely solves the safety hazards of lithium cobalt oxide and lithium manganese oxide. Lead acid batteries can explode under strong collisions, while lithium iron phosphate has undergone strict safety testing and will not explode even in severe collisions.
9. Environmental protection:
Lithium iron phosphate batteries do not contain any heavy metals or rare metals, are non-toxic, and are pollution-free in both production and use. They comply with European RoHS regulations and are environmentally friendly batteries. However, lead-acid batteries contain a large amount of lead, which, if not properly disposed of after disposal, can still cause secondary pollution to the environment.
10. Working temperature range:
The working temperature range of lithium-ion batteries is -20-60 ℃. Do not use air conditioning to reduce equipment installation, maintenance, and electricity costs. The working temperature range of lead-acid batteries is 15-35 ℃.
