nav_bg

What is lifepo4 battery? Lets come look

Time:2023-2-17 16:04:05

Lithium Iron Phosphate Like other batteries, LiFePO4 batteries are made from electricity-generating electrochemical cells that power electrical devices. A LiFePO4 battery consists of a positive electrode, positive electrode, separator, electrolyte, positive and negative current collectors. The positive terminal of the battery is called the cathode and the negative terminal is called the anode. Anode terminal as Li-ion source. The electrolyte carries positively charged lithium ions from the anode to the cathode and vice versa through the separator. The movement of lithium ions generates free electrons in the anode. Thus, electrons will flow through the external circuit to the cathode, the positive terminal. So when there is an electrical load, current will flow from the positive terminal to the negative terminal connected across the battery. Batteries consist of concentric alternating layers of negative and positive electrode materials, with separator layers positioned between these layers. The battery is then filled with electrolyte, allowing ion conduction.

The manufacturing method for the cathode terminal must be able to release large amounts of lithium ions during battery operation. The most common cathode material is Licoo2, but this material has some disadvantages. Therefore, LiFePO4 can be used as a substitute for LiCoO2. More recently, anode terminals have been made from natural or synthetic graphite. However, with the advancement of technology, lithium titanate (LTO) has become a very promising anode material to replace graphite. The most commonly used electrolyte consists of lithium salts, such as LiPF6 in organic solution.

The next section discusses how LiFePO4 charge and discharge cycles work:

State of charge: positive electrode and negative electrode composed of lithium iron phosphate. Iron ions and phosphate ions form a grid, and lithium ions are loosely trapped. When the battery is charged, these lithium ions are pulled across the separator to the negative graphite electrode, which can trap and hold these crossed lithium ions. The membrane is made of a polymer (plastic) and has many small pores that allow lithium ions to pass through easily. The battery will be fully charged when all the positive lithium ions available in the cathode terminal reach the anode terminal and are correspondingly stored between the graphene layers.

 

Assuming four single-cell batteries in series, this converts the battery pack’s voltage to about 12 volts for analysis. LiFePO4 battery charging can be divided into two phases:

Constant current charging: In the first stage of charging, the current is kept constant, and the charging rate is 0.5C, which means the battery will be charged at half capacity. For example, when charging a battery with a capacity of 200Ah, the charge rate will remain constant at 100Amp.
During constant current charging, the charging voltage of the battery will slowly rise to a “sink” voltage of 14.4 V.
Saturation charging: Once the battery is 90% charged, that is, the absorption voltage is reached, the battery will enter the second charging stage, which is called saturation charging. At this point, the battery voltage remains constant and the current will drop steadily. 100% state of charge (SOC) is reached once the current has dropped to approximately 5% to 10% of the battery’s Ah rating.

Discharge state: As mentioned earlier, during the charging cycle of LiFePO4 in the battery, the positive lithium ions released from the positive electrode move to the negative electrode through the electrolyte and are stored there. When all available lithium ions have reached the negative terminal, the battery can be fully charged. When a rechargeable battery is connected to an electrical load, positive ions move through the separator from the negative terminal back to the positive terminal. At the same time, electrons flow through the external circuit, causing current to flow through the electrical load circuit, and the battery releases its stored energy. Electrons cannot flow through the electrolyte because of the insulating barrier (i.e., the separator). When the battery is fully discharged, all lithium ions are moved back to the lithium iron phosphate electrode.

relevant information
  • China Long-lasting and Efficient Power manufacture: Discover the 100Ah Lithium Battery LiFePO4
    In recent years, there has been a significant shift towards the use of lithium batteries in various applications. These batteries offer numerous advantages over traditional lead-acid batteries, including longer lifespan, higher energy density, and faster charging capabilities. One such lithium battery that has gained considerable popularity is the 100Ah Lithium Iron Phosphate (LiFePO4) battery.   The 100Ah LiFePO4 battery is...
    Read more
  • 12V 100Ah LiFePO4 Lithium Iron Phosphate Battery: An Efficient and Durable Power Solution
    Introduction: In recent years, there has been a growing demand for efficient and durable power solutions to meet the increasing energy needs of various sectors. One such solution that has been gaining popularity is the 12V 100Ah LiFePO4 Lithium Iron Phosphate battery. This article aims to explore the features, benefits, and applications of this advanced battery technology.   Features and...
    Read more
  • Power Up Your Vehicle with a Reliable Car Starter Battery
    A reliable car starter battery is an essential component of any vehicle. It is responsible for providing the power needed to start the engine and keep the electrical systems running while on the road. Without a reliable battery, your car won’t be able to start, and you may find yourself stranded on the side of the road.   In this...
    Read more
  • The Advantages of Lithium Starter Batteries
    Lithium starter batteries are a relatively new technology that is rapidly gaining popularity among vehicle owners due to their numerous advantages over traditional lead-acid batteries. If you considering upgrading your vehicle battery, here are some of the benefits you can expect from a lithium starter battery.   1. Lightweight and Compact   One of the most significant advantages of lithium...
    Read more
  • Revolutionizing Off-Roading: The Power of an Electric Dirt Bike Lithium Battery
    Off-roading has always been an exhilarating and adventurous activity, but now it is being revolutionized by the power of an electric dirt bike lithium battery. Gone are the days of noisy and polluting gas-powered dirt bikes. Electric dirt bikes are the future of off-roading, providing a cleaner and more sustainable way to enjoy the great outdoors.   The lithium battery...
    Read more
  • Power Up Your Car with a Reliable Starter Battery Pack
    Car batteries are the lifeline of your vehicle, and without them, your car won start. The battery pack is responsible for providing the necessary power to start the engine and run the electronics in your car. A reliable starter battery pack is essential for the smooth functioning of your car.   In this article, we will discuss the importance of...
    Read more
  • Power Up Anywhere with Portable Jump Starter Battery Packs
    Portable jump starter battery packs are a must-have for anyone who drives a car. These battery packs are designed to provide an emergency power source to jump start your car when your battery dies. They are compact, lightweight, and easy to carry around in your car, making them perfect for long road trips, camping trips, or just for everyday use....
    Read more