Brief differences between lithium ion battery pack and lead acid battery pack

- May 19, 2020-

Do you know the advantages beween Lithium Ion battery pack and lead acid battery pack?

Here is the brief differences between lithium ion battery pack and lead-acid battery pack

Lithium battery: it is a kind of battery which is made of lithium metal or lithium alloy as negative material and USES non-aqueous electrolyte solution.

Battery: a type of battery used to store a limited amount of electrical energy for local use. It works by converting chemical energy into electrical energy.

Second, from the weight energy density, volume energy density, service life, price, applicability, charging, national policy, environmental protection and other perspectives to analyze

(1)Weight energy density

The lead-acid battery pack weighs 16-30 kg and has a large volume. Lithium battery weight in general 2.5-3.0 kg, relatively small volume. The current lithium battery pack energy density is generally in 200~260wh/g, lead acid is generally in 50~70wh/g, so the weight energy density of lithium battery is lead acid 3~5 times, which means the same capacity, lead acid battery is lithium battery 3~5 times, so in the energy storage device lightweight, lithium battery pack occupies the absolute advantage.

(2)Volume energy density

The volume capacity density of lithium battery pack is generally about 1.5 times that of lead-acid battery, so under the same capacity, the volume of lithium battery is about 30% smaller than that of lead-acid battery.

(3)Service life

The lithium battery of lithium iron phosphate anode material can reach about 2000 times, which is 1.5 ~ 5 times more than the lead acid battery. This greatly reduced the use of lithium battery cost, extended the use of life, progress in the use of bento. The cycle times of lead-acid battery are generally only 300~350 times, so the service life of lithium battery is about 3-6 times that of lead-acid battery.

(4) the price

Now lithium battery in the price is more expensive than lead acid, about 3 times, but combined with the use of life analysis, investment of the same capital, still is lithium battery pack use cycle to be a little longer.

(5) the applicability

Lithium battery pack because the safety is slightly worse than lead-acid battery, so in the use of the need to do a variety of safety precautions, such as to prevent external forces or accidents to lithium battery damage, because this may cause fire or explosion; Today's lithium-ion batteries are also temperature-friendly, so they are no less adaptable than lead-acid batteries in other ways.

(6)The country is making good policy

Lead-acid batteries for production or abandon battery formation damage to the environment is quite serious, so from the national policy guidance, is now within constraints, the expansion of the lead-acid battery, or in some categories constraints, the use of lead-acid battery, the future trend of lithium battery pack to replace lead-acid battery will be even more significant, progress will also speed up step by step.

(7)Charging speed

Lithium battery has a wide range of charging efficiency, which is the common advantage of lithium battery. When needed, the charging time can be controlled within 20min ~ 1h, and the charging efficiency can reach more than 84%. Lead-acid batteries now do not.

(8)Environmental protection function

Lithium iron phosphate battery pack does not contain any heavy metals and rare metals, non-toxic, no matter in the production and use are pollution-free, in accordance with European RoHS regulations, is a green battery. However, there is a large amount of lead in lead-acid batteries, which will cause secondary pollution to the environment if it is not properly disposed after being discarded.


3. Disadvantages of lithium batteries

The same voltage and the same capacity of lithium battery price than lead-acid battery is about one times more expensive.

● because lithium ion battery components are very active, if the use of errors will occur electrolyte decomposition, combustion and blasting of major accidents.

● battery function deteriorates significantly at low temperature, discharge platform decreases, output power decreases, available power attenuation, etc.

Conclusion: "natural selection, survival of the fittest", apparently battery in comparison with the lithium battery pack on the basis of the current can not meet the increasingly progressive needs of our public. The lithium battery industry is developing rapidly and is being used more and more widely. In the battery market, the traditional lead-acid battery has been gradually replaced by the new function lithium battery