Lithium iron phosphate battery: features, application

Date:

2018-03-18 17:30:56

Views:

285

Rating:

1Like 0Dislike

Share:

Modern equipment is day by day becoming more complex and powerful. High standards place high demands on batteries, which combine high performance, energy efficiency, and have increased the supply of electricity.

lithium iron phosphate battery

The Introduction of new types of electrical equipment in production, acceleration of technological process – all this increases the requirements for energy sources, and modern batteries are not always able to satisfy. To solve this problem, manufacturers have gone the way of improvements to lithium-ion technology. So was born the lithium-iron-phosphate battery (LiFePO4), which is the ideological descendant of the Li-ion batteries.

Historical background

LiFePO4, or LFP, – the natural mineral family of olivine, was first discovered in 1996, scientists from the University of Texas by John Goodenough, who was looking for ways to improve Li-ion energy sources. Notable was the fact that this mineral had a lower toxicity and a higher thermal stability than anything known at the time the electrodes.

Besides, he met in a natural environment and had a lower cost. The main drawback of LiFePO4 electrodes at the base was a small capacity, causing the lithium-iron-phosphate battery no longer developed.

battery electric vehicle

Research in this direction was renewed in 2003 at the Massachusetts Institute of technology. A team of scientists worked to create a radically new battery that would replaced the most progressive at that time Li-ion batteries. The project became popular, large companies such as Motorola and Qualcomm, which brought the advent of batteries with LiFePO4 cathode elements.

Recommended

The most effective methods of seed germination

The most effective methods of seed germination

Despite the fact that the method of seedling in vegetable production is a very time consuming process, it is used by most gardeners. Planting seeds in open ground is an easy and convenient method, but it is effective only in certain climatic zones. I...

Retro-reflective paint. The scope of

Retro-reflective paint. The scope of

When the vehicle began to fill the road, their popularity began to gain reflective paint. Thanks to this paint, as drivers and pedestrians becomes much easier to avoid accidents in the dark. Purpose paint Reflective paint – paint material, whic...

How to make icon with your own hands - options izgotovleniya (simple and complex)

How to make icon with your own hands - options izgotovleniya (simple and complex)

In Soviet times, many collecting badges, emblems, pennants. To get them was not easy. And today, thanks to technology, you can make them yourself. Knowing how to make icon with your own hands, and you can make original gifts to your friends, and make...

Battery based on LiFePO4

This type of batteries uses the same technology for producing electricity, that familiar to us the lithium-ion cells. However, between them there also some significant differences. First, is the use of a private type, BMS-control system, which protects the electric batteries from overcharge and low discharge, increases service life and makes an energy source more stable.

Secondly, LiFePO4, in contrast to LiCoO2, is less toxic. This fact helped to avoid certain problems related to environmental pollution. In particular to reduce emissions of cobalt to the atmosphere if not properly disposed of the battery.

Finally, due to the lack of uniform standards LFP elements have different chemical composition, what determines the variation in technical characteristics of models in a wide range. In addition, maintenance of these power sources is more complex and should be carried out following certain rules.

Specifications

It is Worth saying that lithium iron phosphate batteries 48 Volts, 36 Volts and 60 Volts produced by the serial connection between individual cells, because the maximum voltage in one LFP section may not exceed 3,65 V. Therefore, the technical performance of each battery can differ significantly between themselves – it all depends on the Assembly, and specific chemical composition.

For performance analysis we give the nominal value of a single cell.electric accumulators

The Best implementation capacities of each individual cell was achieved in a battery Everexceed. Lithium-iron-phosphate batteries Everexceed provide a long service life. Only they are able to withstand up to 4 thousand cycles of charge-discharge loss of capacity to 20%, and replenishment of energy reserves occurs in 12 minutes. Given this, it can be concluded that the batteries of Everexceed are one of the best representatives of the LFP elements.

Advantages and disadvantages

The Main advantage in a favorable light emit lithium-iron-phosphate battery among the other members of AKB, is the durability. Such an element is able to withstand more than 3 thousand cycles of charge-discharge at falling of level of electricity to 30%, and more than 2 thousand-in the fall up to 20%. Due to this the average battery life is about 7 years.

Stable charge current is a second important advantage of the LFP elements. The output voltage remains at 3.2 V until then, until the charge is completely exhausted. This allows to simplify the wiring diagram, eliminates voltage regulators.

lithium iron phosphate batteries 48 volt

Higher peak current-third of their advantage. This property AKB allows them to produce maximum power even at very low temperatures. This property has prompted automakers to use lithium-iron-phosphate battery as the primary energy source when you run petrol and diesel engines.

Along with all the presented advantages, LiFePO4 battery have one significant drawback-a large mass and dimensions. This limits their use in some types of machinery and equipment.

Features

If you buy ready-made lithium-phosphate batteries, the difficulties with maintenance and operation, you will not have. All thanks to the fact that manufacturers build in such elements of the Board BMS that prevents overcharging and not allowed to discharge the element down to the lowest level.

rechargeable battery lithium iron phosphate for electric bikes

But if you purchase individual cells (penlight batteries, for example), then you will have to monitor the charge level on their own. In the fall of the charge below the critical level (below 2.00) will start to plummet and capacity, making it impossible to recharge the elements. If you, instead, allow overcharging (above 3.75 In), the cell will just swell due to the evolved gases.

If you use such a battery for the electric vehicle, then after 100% charging, you must unplug the charger. Otherwise, the battery will swell due to saturation by an electric current.

Rules of operation

If you plan to use lithium-phosphate batteries are not in cyclic mode, and a buffer, for example, as a power source UPS or in conjunction with a solar battery, then you need to take care of the downgrading of the charge to 3.40 to 3.45 V. to Cope with this problem help “smart" charger, which automatically first fully replenish energy, and then lower the voltage level.

During the operation you need to monitor the balance of cells, or to use a special balance Board (in the battery for the electric vehicle they are built). Imbalance of cells call this condition, when the total device voltage remains at the nominal level, but the voltage of the cells becomes different.lithium iron phosphate battery pros and cons

A Similar phenomenon occurs due to differences in resistance of individual sections of the poor contact between them. If the cells have different voltage, and they are unevenly distributed charge-discharge, which significantly reduces the battery life.

Enter battery operation

Before using lithium-phosphate batteries collected from individual cells, it is necessary to take care of the balancing system, because the sections can have different level of charge. For this purpose all the components are connected in parallel and connected to the rectifier charger. United therefore, the cells need to charge to 3.6 V.lithium iron phosphate batteries everexceed

Using the battery of lithium iron phosphate for electric bikes, you probably noticed that in the first few minutes of operation, the battery gives the maximum power, and then charge rapidly drops to 3.3 and 3.0 V. don't be afraid, it's normal battery life. The fact that the bulk of its capacity (about 90%) lies in this range.

Conclusion

The efficiency of lithium-phosphate batteries is 20-30% higher than other batteries. They serve for 2-3 years longer than other sources of electricity and provide stable current for the entire period of operation. All of this highlights the elements in a favorable light.

However, most people will ignore a lithium-iron-phosphate batteries. The pros and cons of battery pales in front of them – it is 5-6 times more than usual for us lead-acid elements. A battery for a car on average costs about 26 thousand rubles.

...

Article in other languages:

BE: https://tostpost.com/be/hatn-tul-nasc/20263-l-tyy-zhaleza-fasfatnyh-akumulyatar-haraktarystyk-prymyanenne.html

DE: https://tostpost.com/de/gem-tlichkeit/20279-lithium-eisen-phosphat-akku-eigenschaften-anwendung.html

ES: https://tostpost.com/es/la-comodidad-del-hogar/20288-la-bater-a-de-litio-hierro-fosfatado-la-bater-a-caracter-sticas-aplica.html

KK: https://tostpost.com/kk/domashniy-uyut/20257-litiy-tem-r-fosfatnyy-batareya-sipattamalary-oldanu.html

PL: https://tostpost.com/pl/komfort-domu/20232-akumulator-litowo--elazowo-fosforan-bateria-charakterystyka-zastosowan.html

PT: https://tostpost.com/pt/o-aconchego-do-lar/20231-l-tio-ferro-fosfatnyy-bateria-caracter-sticas-a-aplica-o-de.html

TR: https://tostpost.com/tr/domashniy-uyut/20262-lityum-demir-fosfat-pil-zellikleri-uygulama.html

UK: https://tostpost.com/uk/domashn-y-zatishok/20252-l-t-y-zal-zo-fosfatniy-akumulyator-harakteristiki-zastosuvannya.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

Comments (0)

This article has no comment, be the first!

Add comment

Related News

Domodedovo South. LCD

Domodedovo South. LCD "southern Domodedovo": reviews, prices and photos

According to the company «Yandex», Domodedovo, Moscow region – the leader among the cities of the Moscow region according to distance and availability. So now there is active development. The new project is calle...

Fasteners for drywall: structure and types of auxiliary fasteners

Fasteners for drywall: structure and types of auxiliary fasteners

In modern conditions decoration widely used metal profile. From it going to the frame under the drywall, which can be done in several levels (e.g., two - or three-tiered ceilings). Metal profile used as a fastener for drywall long...

U-shaped profiles are indispensable construction material

U-shaped profiles are indispensable construction material

With the development of repair and construction technologies there are many modern structural materials, which combine these essential qualities as high durability, ease of use and low cost. Among such materials one of the honored...

How to pour the Foundation under the house: advice from the experts

How to pour the Foundation under the house: advice from the experts

the Foundation is the basis of any modern (and not only) at home. Without it you will not be able to build even a little bit reliable of the barn, so to treat fill, should be most seriously.Before you pour the Foundation under the...

How to paint fur of a Fox at home and use it in a new capacity

How to paint fur of a Fox at home and use it in a new capacity

a Pity to throw away worn-out coat? Try to find another solution! For many accustomed to paint and update old bottles to re-use them in clothing or accessories. But can you find other ideas?fashion «the Mexican jerboa”...

Pressure switch water - key to sustainable operation of water supply system

Pressure switch water - key to sustainable operation of water supply system

the Modern system of water, especially when it comes to apartment buildings, not always able to provide the necessary stable water pressure. In this case, come to the aid of small in size but multifunctional water pumps integrated...