Eight Advantages of Lithium Iron Phosphate Battery

Lithium iron phosphate batteries are used as lithium-ion secondary batteries. Now the main direction is power lithium batteries. Compared with NI-H and Ni-Cd batteries, they have great advantages. The following Lithium Iron Phosphate Battery Manufacturer introduces the eight advantages of lithium iron phosphate batteries.

Lithium iron phosphate battery as the cathode material for lithium ion batteries. This new material is not LiCoO2; LiMn2O4; LiNiMO2, which are the anode materials of lithium ion batteries in the past. Its safety performance and cycle life are incomparable with other materials. These are also the most important technical indicators of power batteries. 1C charge and discharge cycle life reaches 2,000 times. Single battery overcharge voltage 30V does not burn or explode. The puncture does not explode. Lithium iron phosphate cathode materials make large-capacity lithium-ion batteries easier to use in series.

1 Super long life

The long-life lead-acid battery has a cycle life of about 300 times and a maximum of 500 times, while the lithium iron phosphate power battery has a cycle life of more than 2000 times and can be used up to 2000 times with standard charging (5 hour rate). Lead-acid batteries of the same quality are "new half year, old half year, and half a year of maintenance", which is at most 1-1.5 years, and lithium iron phosphate batteries under the same conditions will reach 7-8 years. " Lifetime. " Taken together, the performance-price ratio will be more than 5 times that of lead-acid batteries.

2 Use safety

Lithium Iron Phosphate Battery completely solves the safety hazards of lithium cobaltate and lithium manganate. Lithium cobaltate and lithium manganate will explode under strong collision and pose a threat to consumers' life and safety. The safety test will not produce the most characteristic lithium battery even in the worst traffic accidents.

Lithium Iron Phosphate Battery

3 High current 2C fast charge and discharge

Under the special charger, the battery can be fully charged within 1.5 minutes of 1.5C charging, and the starting current can reach 2C, but lead-acid batteries do not have this performance now.

4 High temperature resistance

The lithium iron phosphate electrothermal peak value can reach 350 ℃ -500 ℃ while lithium manganate and lithium cobaltate are only around 200 ℃.

5 large capacity

The lithium iron phosphate power battery has a continuous mileage of 3-4 times that of the same quality lead-acid battery. Its advantages allow electric bicycles to run more than 100 kilometers on a single charge under the premise of a moderate weight. For office workers, a single charge Able to use for about a week. Under the condition that the weight of the electric bicycle equipped with the lead-acid battery does not exceed the standard, the maximum battery capacity is 12 Ah (the weight of the lead-acid battery has reached 13 kg at this time, and the weight of the lithium iron phosphate battery of the same capacity is only 5 kg) , Can charge up to about 50km on a single charge.

6 No memory effect

Rechargeable batteries often work under fully charged conditions, and their capacity quickly drops below the rated capacity. This phenomenon is called the memory effect. Like nickel-metal hydride and nickel-cadmium batteries, there is memory, but lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be used as soon as it is charged.

7 Small size and light weight

The volume of lithium iron phosphate battery of the same specification capacity is 2/3 of the volume of the lead-acid battery and 1/3 of the volume of the lead-acid battery.

8 Green

The lithium iron phosphate battery is free of any toxic and harmful substances and will not cause any pollution to the environment. It is recognized by the world as a green and environmentally friendly battery. The battery is free of pollution in both production and use.

What is the Cycle Life of Lithium Iron Phosphate Batteries?

Lithium iron phosphate has good electrochemical performance and low resistance. This is achieved with nanoscale phosphate cathode materials. The main advantages are high rated current and long cycle life; good thermal stability, enhanced safety and tolerance to abuse. The following Lithium Iron Phosphate Battery Manufacturerwill give you a detailed introduction to the life of lithium iron phosphate batteries.

If kept at high voltage for a long time, lithium iron phosphate is more resistant to all charging conditions and has less stress than other lithium ion systems. The disadvantage is that the lower nominal voltage of the 3.2V battery makes the specific energy lower than that of cobalt-doped lithium ion batteries. For most batteries, low temperature will reduce performance, and increasing storage temperature will shorten service life, and lithium iron phosphate is no exception. Lithium iron phosphate has a higher self-discharge than other lithium-ion batteries, which may cause aging and bring about balance problems. Although it can be compensated by using high-quality batteries or using advanced battery management systems, both methods Increase the cost of the battery pack. Battery life is very sensitive to impurities in the manufacturing process and cannot withstand moisture doping. Due to the presence of moisture impurities, some batteries have a minimum life of only 50 cycles.

Lithium Iron Phosphate Battery is often used instead of lead acid starter batteries. Four series batteries produce 12.80V, which is similar to the voltage in series of six 2V lead-acid batteries. The vehicle charges lead acid to 14.40V (2.40V / battery) and maintains a floating charge state. The purpose of the float charge is to maintain a full charge level and prevent sulfated lead-acid batteries.

Lithium Iron Phosphate Battery

By connecting four lithium iron phosphate batteries in series, the voltage of each battery is 3.60V, which is the correct full charge voltage. At this time, the charging should be disconnected, but continue to charge while driving. Lithium iron phosphate tolerates some overcharging; however, as most vehicles keep the voltage at 14.40V for long periods of time during long journeys, it may increase the mechanical stress of lithium iron phosphate batteries. Time will tell us how long lithium iron phosphate can withstand overcharging as a replacement for lead-acid batteries. Low temperature will also reduce the performance of lithium ions, which may affect the starting ability in extreme cases.

Lithium iron phosphate has good safety and long life, moderate specific energy, and enhanced self-discharge ability. Lithium iron phosphate batteries are lithium-ion secondary batteries. One of the main uses is for power batteries, which has great advantages over NI-MH and Ni-Cd batteries. The lithium iron phosphate battery has a higher charge and discharge efficiency, and the charge and discharge efficiency can reach more than 90% in the case of rate discharge, while the lead-acid battery is about 80%.

The P-O bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even at high temperature or overcharge, it will not collapse and generate heat or form strong oxidizing substances like lithium cobaltate, so it has good safety. Some reports pointed out that in actual operation, a small number of samples were found to have burned during acupuncture or short-circuit experiments, but no explosion event occurred. However, in the overcharge experiment, high-voltage charging was used that significantly exceeded the discharge voltage by several times. Nevertheless, its overcharge safety has been greatly improved compared to ordinary liquid electrolyte lithium cobaltate batteries.

However, some experts said that environmental pollution caused by lead-acid batteries mainly occurs in irregular production processes and recycling processes. In the same way, lithium battery belongs to the new energy industry, but it can't avoid the problem of heavy metal pollution. In the processing of metal materials, lead, arsenic, cadmium, mercury, chromium, etc. may be released into dust and water. The battery itself is a chemical substance, so there may be two kinds of pollution: one is the process excreta pollution in the production engineering; the other is the battery pollution after scrapping.

Is Lithium Iron Phosphate Battery Restricted for Use in Low Temperature Environments?

In addition to the serious decline in discharge capacity, lithium batteries cannot be charged at low temperatures. During low-temperature charging, the intercalation of lithium ions on the graphite electrode of the battery and the lithium plating reaction coexist and compete with each other. Diffusion of lithium ions in graphite is suppressed under low temperature conditions, and the conductivity of the electrolyte decreases, which results in a decrease in the intercalation rate and makes the lithium plating reaction easier to occur on the graphite surface. The main reasons for the decrease in the life of lithium-ion batteries when they are used at low temperatures are the increase in internal resistance and the loss of capacity due to the precipitation of lithium ions.

At low temperatures, lithium batteries bring about a decrease in the activity of positive and negative electrode materials and a decrease in the conductivity of the electrolyte. In response to the macro, a series of results such as decreased capacity, increased internal resistance, and reduced discharge efficiency occurred. However, the lithium battery has good high temperature performance: the thermal peak value of the lithium iron phosphate battery can reach 350 ~ 500°C, the operating temperature range is wide, and it can still discharge 100% capacity under high temperature conditions.

During the charge-discharge process of lead-acid batteries, there are electrochemical polarization and concentration polarization. Large-current charge and discharge are mainly affected by concentration polarization. For lead-acid batteries, when the operating temperature drops below 0°C, serious negative polarization will occur during the initial charge of the battery, which will limit the battery's ability to accept charges, which will cause the battery's charge and discharge to decrease significantly as the temperature decreases.

When the ambient temperature drops below 0°C, the internal resistance increases by about 15% for every 10°C decrease in temperature. Because the viscosity of the sulfuric acid solution increases, the resistance of the sulfuric acid solution is increased, and the effect of electrode polarization is aggravated. The battery capacity will be significantly reduced.

Compared with lead-acid batteries, Lithium Iron Phosphate Battery's low temperature performance and high current performance are weaker, which is definitely not good for starting power. The discharge performance of lead-acid batteries can cope with more severe environments, and lithium batteries cannot perform in low temperature areas. In addition to the low temperature, in the summer exposure conditions, the high temperature of 60 to 70 degrees in the engine compartment can easily make lithium electronics scrap. In terms of high-current performance, the instantaneous current of the car at startup is mostly above 200A, and the performance of lithium batteries will rapidly decline at high rates.

At low temperatures, the discharge performance of lithium batteries will suddenly decrease, especially now that it is winter. The colder weather in the north has a significant impact on lithium batteries. This was also verified when chatting with a Tesla owner; and The low-temperature performance of the lead-acid battery is very good. According to data from the Internet, when the voltage is discharged at a rate of 10C in an environment of -10 degrees Celsius, a voltage above 10V can be maintained for more than 90 seconds.

LFP Battery System

So how to improve the low temperature performance of lithium iron phosphate battery? LFP Battery System Supplier will come to tell you.

Factors affecting the low-temperature characteristics of lithium iron phosphate batteries: One is the influence of the positive electrode. The lithium iron phosphate positive electrode has poor electronic conductivity, and it is more prone to polarization and reduce capacity. The second negative electrode, the negative electrode, is mainly low temperature. Charging because it affects safety issues; the third is the electrolyte, which may increase the viscosity at low temperatures and the lithium ion migration resistance will increase; the fourth is the binder, which is now a low temperature for the battery The performance impact is also relatively large. At present, some manufacturers have improved the low-temperature performance of lithium iron phosphate batteries by improving the electrolyte system, improving the formula of the positive electrode, improving the performance of materials, and improving the design of the cell structure, but they have not really met the demand.

5 Application Fields of LFP Battery

Although the megatrend of new energy passenger car power batteries will be the world of three yuan, this does not mean that the "fighting" of the application of lithium iron phosphate batteries is pronounced. Instead, the market is closing multiple doors while opening multiple windows.

It is foreseeable that in the next few years, with the year-on-year growth in the field of passenger cars, Sanyuan will play an absolute protagonist in the installed equipment. For lithium iron phosphate batteries, in addition to occupying an absolute advantage in the field of passenger cars, In the sub-fields, new application opportunities are also emerging.

From a demand-side perspective, this trend is already very clear. Facing the sharp decline of subsidy policies, auto companies have switched from the idea of subsidies that blindly pursued energy density in the past, and have begun a comprehensive market-oriented approach. Based on comprehensive considerations of cost and performance, A00-class models, electric logistics vehicles, 48V Significant demand has begun to appear in sub-segments such as micro-hybrid systems, electric grid-connected cars, and electric forklifts. At the same time, in the fields of base station energy storage and grid energy storage, the application of lithium iron phosphate has also started to rise.

From the perspective of the supply side, the continuous decline in the prices of raw materials and the release of production capacity caused by investment in the past few years means that there will be room for further decline in the market price of lithium iron phosphate batteries. In terms of technical performance, as the earliest industrialized power battery technology route, mainstream lithium iron phosphate battery companies have continued through iteration from cell design, material selection, process matching, production equipment, and lightweight packaging. Innovation.

UPS Lithium-ion Battery System Supplier sorts out the four major application markets where lithium iron phosphate batteries may or has already started to heat up, and analyzes new market opportunities for lithium iron phosphate batteries through specific market segment analysis.

1. Micro electric vehicle

Electric vehicles are fully marketed, and micro electric vehicles may take the lead. From the perspective of the market, the demand and acceptance of micro electric vehicles in third- and fourth-tier cities is gradually increasing. The price acceptance is within 50,000 yuan and the battery life is 200km Within. Based on this change in direction, many car companies judge that market acceptance and the rectification of low-speed vehicles will accelerate the market penetration of A00-class electric models.

From the perspective of the choice of supporting power batteries, this model does not have high battery life requirements, but has a high sensitivity to the overall price. Based on this, lithium iron phosphate batteries may have more advantages than Sanyuan in this field. Car companies have begun to make adjustments and transformations. It is expected that in 2019, the installed capacity of Lithium Iron Phosphate Battery in the field of micro electric vehicles will rise.

Lithium Iron Phosphate Battery

2. Electric network booking

Different from family cars, electric network car is more defined as a production tool. Therefore, it is more sensitive to prices than family cars. Secondly, in the use scenario, it also presents some special needs, which are reflected in the following several aspects:

The first is to reach more than 300 kilometers in battery life, which can basically meet the order requirements for a day, but it does not need too much battery life redundancy, otherwise it will increase costs; the second is to charge more for the order The time requirement is short, so it needs to achieve fast charging performance. Third, although the battery life is not high, the service life is higher, and the cycle life of the power battery is higher than that of a family car.

3. Energy storage

Regardless of the energy storage subdivisions such as base station energy storage, backup power, grid and user-side energy storage, the application of lithium iron phosphate batteries is being started on a large scale.

With the large-scale automated production in the field of power batteries in the past few years, coupled with the centralized release of production capacity and further reduction of raw materials, this means that the application of lithium iron phosphate batteries in the field of energy storage will be further spread.

How to Use Lithium-ion Batteries to Improve Ups Performance?

China Energy Storage Network News: Because lithium-ion batteries have higher power density and lighter weight than lead-acid batteries, UPS power supplies for data center operators can now switch to this smaller, lighter UPS Lithium-ion Battery System. Overall, the cost of downtime for a typical data center is estimated at $ 9,000 per minute, so it is important to do all the research when investing in a reliable backup system because it plays an important role in reducing the number of downtime. A well-designed UPS (uninterruptible power supply) is used in conjunction with an advanced battery system to ensure that even if a power problem occurs, its operation can be continued without downtime.

The UPS power supply system uses the battery to provide uninterrupted power in the event of a power outage until it switches to a standby diesel generator to start or safely shut down the equipment. UPS power can also act as a power conditioner by absorbing or injecting power to overcome short-term spikes and voltage drops in utility power. These are usually caused by voltage transients when other large grid-connected load equipment is turned on and off.

Recently, data centers have shifted from relying on valve-regulated lead-acid batteries to lithium-ion batteries. In the next five years, lithium-ion batteries are expected to occupy at least 10% of the market.

There are many reasons for this. One of them is the higher power density and higher energy density of lithium-ion batteries, which can provide more power while reducing floor space and weight. Compared with lead-acid batteries, lithium-ion batteries can be three times smaller and six times lighter. In addition, it has a higher cycle life than other battery technologies, which means it has a longer life. In addition, lithium-ion batteries work more reliably at higher temperatures and require less cooling, which reduces battery footprint.

 

Lithium-Ion Battery System

Although there are several types of lithium-ion batteries, Lithium Iron Phosphate Battery is suitable for industrial and mission-critical applications that focus on safety, power density and operating life. Lithium-ion batteries have the advantages of high availability, low maintenance requirements, and fast discharge. This minimizes the risk of unexpected data center outages. However, the Lithium-Ion Battery System can be equipped with an intelligent monitoring system, so workers can check their state of charge (SOC) and health (SOH) at any time. So you can make an informed judgment when you need to replace the battery, and don't waste too much time replacing the battery. It can also prevent the loss of critical backup power by eliminating failures.

Therefore, by adopting a lithium-ion battery system, the power of air-conditioning equipment can be reduced, electricity costs can be reduced, and energy consumption can be reduced during the life of the battery, thereby reducing operating costs.

In addition, because lithium-ion batteries have higher power density and are lighter than lead-acid battery cells, data center operators can now switch to smaller and lighter lithium-ion batteries, minimizing the space they occupy. For enterprises and co-located data centers, this can save significant infrastructure space and allow more servers to be deployed.

Lithium-ion batteries are now widely used in everyday life, from mobile phones and computers to megawatt-level energy storage in grid stabilization and solar applications. They are everywhere. Applications in data centers require less space, smarter equipment, longer uptime, and optimization of the entire ecosystem, including air conditioning in the computer room. . With the increasing use of lithium-ion batteries and the continuous improvement and growth of key requirements, lithium-ion batteries can meet the needs of today and tomorrow's data centers.