LEAD-ACID BATTERIES VS LITHIUM-ION BATTERIES -By Agnijita Roy

We happen to live in a world where technology is advancing at a rapid pace. Amidst all advancements, the most existing one is the idea of replacement of lead-acid battery with the lithium-ion battery. The substantial benefits that Lithium Ion technology offer over lead-acid technology means that using Lithium Ion batteries is becoming an ever more popular choice.

This blog aims at highlighting the comparison between Lead-Acid Battery and Lithium-ion battery.


What is Lead-Acid Battery?

The battery which uses sponge lead and lead peroxide for the conversion of the chemical energy into electrical power, such type of battery is called a lead acid battery. The lead acid battery is most commonly used in the power stations and substations because it has higher cell voltage and lower cost.

What is Lithium-Ion Battery?

Lithium-ion batteries (LIB) are a family of rechargeable batteries having high energy density and commonly used in consumer electronics. Unlike the disposable lithium primary battery, a LIB uses intercalated lithium compound instead of metallic lithium as its electrode. Usually, LIBs are significantly lighter than other kinds of rechargeable batteries of similar size. LIBs are heavily used in portable electronics. These batteries can be commonly found in PDAs, iPods, cell phones, laptops, etc.


BASIS OF COMPARISON :

1. LIFE SPAN OF THE BATTERIES- Batteries depreciate and become less effective as they age. One charge cycle is considered from a point when you use the battery when you charge it back. Measuring the lifespan of a battery based on the number of cycles until the expiry is typical.

2. EFFICIENCY OF WORK- Efficiency is among the essential metrics to consider when comparing lead-acid battery vs. lithium ion battery.

3. CHARGE RATE- Charge and discharge rates are often given as C or C-rate, which is a measure of the rate at which a battery is charged or discharged relative to its capacity.

4. DENSITY OF ENERGY- Energy and power density are two concepts that associates with batteries. Watt-hours per kilogram method are famous for measuring energy density. Watts per kilogram method is best for measuring power density.

5. DEPTH OF DISCHARGE-You can understand discharge depth by knowing the percentage of energy drained without damaging the battery. In other words, it is the total capacity consumed before recharging the battery.

6. INITIAL COST

7. WEIGHT

8. REPLACEMENT CYCLE

CHARACTERISTIC GRAPH OF LITHIUM ION BATTERY

CHARACTERISTIC GRAPH OF LEAD-ACID BATTERY

CHARGE CHARACTERISTICS

RETENTION OF CHARGES UNDER IDEAL CONDITION



EFFECT OF TEMPERATURE ON CAPACITY DISCHARGE CHARACTERISTICS


The following graph shows an example of the charge characteristics after over discharge and leaving the battery in discharge state.

Conclusion

A car battery powers all the electric components. The demand for lithium batteries is soaring high worldwide due to high energy density, lightweight, and the ability to recharge quickly. It is essential to consider the comparisons between lead-acid battery vs. lithium ion battery. Now, it is clear that lithium ion batteries are more beneficial as compared to lead-acid batteries.



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