What are the working principles and advantages of lithium iron phosphate batteries?

Lithium iron phosphate batteries, it is to point to use as the anode material of lithium iron phosphate lithium ion batteries.Lithium ion battery anode materials mainly have cobalt acid lithium, lithium manganese acid lithium, nickel, ternary material, lithium iron phosphate, etc.

Lithium ion batteries are extremely lithium iron phosphate material, its safety performance and cycle life has great advantages, which is one of the most important technical indicators of the power battery.1 c inflation cycle life can do 2000 times, puncture don't explode, overcharge when not easy combustion and explosion.Lithium iron phosphate cathode material to make the large capacity lithium ion battery more and used in series.

Lithium iron phosphate batteries, refers to the use of lithium iron phosphate as the anode material of lithium ion batteries.Lithium ion battery anode materials mainly have cobalt acid lithium, lithium manganese acid lithium, nickel, ternary material, lithium iron phosphate, etc.The cobalt acid lithium is at present most of the lithium ion battery cathode material.From material in principle, the lithium iron phosphate is a kind of embedded, embedded process, the principle and cobalt acid lithium manganese acid lithium is exactly the same.

1, the introduction

Lithium iron phosphate batteries belong to lithium ion secondary battery, a main use is used for power battery, relative NI MH, NI Cd battery has a big advantage.

lithium iron phosphate battery charge and discharge efficiency is higher, discharge case to charge and discharge efficiency can reach more than 90%, while lead-acid batteries is about 80%.

2, advantages

To improve the performance of security

Lithium iron phosphate crystals in P - solid O key, difficult to decompose, even in high temperature or overcharge when also won't like cobalt acid lithium structure collapse fever or strong oxidizing substances, thus having good security.A report pointed out that the practice of acupuncture or short circuit experiment found combustion phenomenon in a small number of samples, but no one explosion occurred, and overcharge experiments using several times greatly beyond their discharge voltage of high voltage charging, found that there are explosive.Even so, the overcharge safety than common liquid electrolyte cobalt acid lithium batteries, has been greatly improved.

The improvement of the life

Long life cycle life of lead-acid battery in about 300 times, the highest is 500 times, and lithium iron phosphate power battery, cycle life reached more than 2000 times, the standard charging rate (5 hours) to use, can reach 2000 times.With the quality of the lead-acid battery is "new half a year, half a year, maintenance, maintenance and half year old", at most 1-1.5 years, while the lithium iron phosphate batteries used under the same conditions, the theory of life will reach 7 ~ 8 years.Comprehensive consideration, the price performance ratio in theory for lead-acid battery more than four times.Large current discharge can be as big 2 C fast charge and discharge current, under the special charger, 1.5 C can make battery charging 40 minutes, starting current can be up to 2 C, lead-acid battery is the performance.

High temperature performance is good

Lithium iron phosphate can reach 350 ℃ to 500 ℃ and the electric peak and cobalt acid lithium manganese acid lithium only at about 200 ℃.Wide range of operating temperature (20 c -- -- - + 75 c), have a high temperature resistant properties of lithium iron phosphate electric peak of up to 350 ℃ to 500 ℃, lithium cobalt and lithium manganese acid and acid only at about 200 ℃.

The large capacity

With greater than ordinary battery (lead-acid, etc.) capacity.Single capacity of 5 ah - 1000 ah.

No memory effect

Rechargeable battery under the condition of are often filled with not to put the work, the capacity will quickly lower than the rated capacity values, this phenomenon is called memory effect.Memory like nickel metal hydride, nickel cadmium battery, and lithium iron phosphate batteries do not have this phenomenon, the battery no matter in what condition, can use increases with the increasing charge, do not need to first put the recharging.

Light weight

The same specification of lithium iron phosphate battery capacity volume is two-thirds the size of lead-acid battery, weight is the 1/3 of lead-acid batteries.

Environmental protection

The battery is generally regarded as do not contain any heavy metals and rare metals (nickel metal hydride battery of rare metals), non-toxic (through the SGS certification), no pollution, comply with European RoHS, is absolutely green battery certificate.So the lithium battery is favored by the industry, mainly environmental considerations, so the battery and listed in the "863" during the tenth five-year national high-tech development plan, has become the national key support and encourage the development of project.With China's accession to the WTO, Chinese exports of electric bikes will increase rapidly, and into Europe and the United States of electric bicycle has asked equipped with battery from pollution.

But experts say, lead-acid battery caused by environmental pollution, mainly in non-standard production process and recycling.By the same token, the lithium battery belongs to new energy industry is good, but it can't avoid the problem of heavy metal pollution.In the metal material processing such as lead, arsenic, cadmium, mercury, chromium is likely to be released into the dust and the water.The battery itself is a kind of chemicals, so is likely to produce two kinds of pollution: one is the production engineering process of waste pollution;2 it is scrapped after the battery pollution.

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