Lead acid versus lithium battery, which is better?

Currently, selling electric cars, either the battery brand, style or brand is complicated, while lead-acid batteries and lithium battery occupy the dominant position, here small make up by comparing to get you more clearly the relationship and difference between the two.

Typically, lead-acid battery in 16-30 kg weight, volume is larger;while lithium battery weight is in commonly 2.5 3.0 kg, the volume is relatively small, so light, handle is convenient.Both from a quality point of view, good or bad it is difficult to define, but consumers can according to own actual need to purchase normal manufacturer production of the battery with good quality.

Lithium battery cathode materials, anode materials, set fluid, membrane, electrolyte advocate material costs a lot higher than lead acid battery.The lead-acid battery assembly and auxiliary material cost is very low and the external circuit system.

Because of making craft, lithium battery of artificial cost is larger.In manufacturing costs, labor costs accounted for more than 40%, lithium-ion batteries, lead-acid battery of artificial cost is commonly 10% ~ 20%.

Lithium battery production equipment expensive, high value, mechanical equipment depreciation loss is bigger.Most of the lithium-ion batteries in the production process is irreversible, and lead-acid battery is reversible repair and used again.Lead-acid battery use after the recovery value of over 40%, and lithium battery recycling value is almost zero.

Lithium battery energy volume ratio, and weight than energy, lithium batteries are more than three times that of lead-acid batteries.Lithium battery smaller volume, lighter in weight.Long cycle life.The cycle life of lithium batteries for electric vehicles is in commonly 800 times or more, using lithium iron phosphate cathode material of lithium battery can reach 2000 times or so, beyond the lead-acid battery 1.5 ~ 5 times.This greatly reduces the lithium-ion batteries use cost, prolong the service life and improve the use convenience degree.With a wide range of charging effect.This is lithium battery has unique advantages.When necessary, can make the charging time control in 20 min ~ 1 h, charging efficiency above 84%.On the basis of further technological innovation, this feature will be better.

As we know, general contrast energy storage products from the weight energy density, energy density, volume, price, service life of applicability, angles such as national policy to:

The weight energy density

Current lithium battery energy density is in commonly 200 ~ 200 wh/g, lead acid is in commonly 50 ~ 70 wh/g, then the weight energy density of lithium battery is lead-acid 3 ~ 5 times, this means that under the condition of same capacity, lead-acid battery is lithium battery of 3 ~ 5 times, so the energy storage device on the lightweight, lithium battery occupy absolute advantage.

The volume energy density

The volume of a lithium battery capacity density is usually around 1.5 times of lead-acid battery, so under the condition of same capacity, lithium battery about 30% smaller than the lead-acid battery volume.

Use cycle

At present more popular material system is three yuan and lithium iron, three yuan power type lithium battery cycles are usually in more than 1000 times,lithium iron phosphate batteries cycles in more than 2000 times, lead-acid battery cycles are usually only about 300 ~ 350 times, so the service life of the lithium battery around three to six times that of lead-acid batteries.

The price

On the price of lithium battery in a lead to expensive, is about three times the left and right sides, but the service life of the analysis, in the cost of the same and is still a lithium battery cycle longer.

applicability

Lithium batteries because security is lead-acid battery is a bit poor, so need to be in use all kinds of security prevention work, such as preventing external force or accident damages to the lithium battery, because it may cause fire or explosion.Now the temperature suitability of lithium-ion batteries is very good also, adaptability, and so on other lithium battery is also no less in lead-acid batteries.

National policy

Lead-acid batteries for production or discarded batteries the damage to the environment is quite serious, so from national policy guidance, have in limiting the expand the reinvestment of lead-acid battery, or in some areas limit the use of lead-acid battery, will become the trend of lithium battery to replace the lead-acid batteries in the future, will also gradually to speed up the progress.

Is the key to the development of new energy vehicles, whether to use the experience to rival or even beyond the traditional internal combustion engine car, at the same time in the link of purchase and after-sales whether has the advantage of better.In my opinion, the key of the development of new energy vehicles, also is the key to haunt the mobile digital products, the development of the battery.How in the case of safety guarantee battery technology can satisfy the growing consumer demand, is not only the automotive related industry of science and technology personnel, or the pursuit of scientific research workers in all areas.

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