There are many kinds of lithium batteries, LiFePO4 battery, Lithium polymer battery and LI-ion battery and etc which will make you dazzled. When you purchasing your ideal lithium batteries for your equipment, one parameter you can not omit–Discharge Rate.
What is Discharge Rate?
Discharge rate: refers to the current value required by the battery to discharge its rated capacity within a specified time. It is numerically equal to a multiple of the rated capacity of the battery, usually represented by the letter C. Generally speaking, a lithium battery with a discharge rate of 0.2~2C is a capacity lithium battery, abbreviated as LCR. The discharge rate of 2C and above is a power lithium battery, abbreviated as LNR/LMR.
What is High Discharge Rate?
High-Discharge rate batteries generally refer to lithium batteries. Li-ion batteries are a kind of rechargeable high-rate batteries, which mainly rely on the movement of lithium ions between the positive electrode and the negative electrode to work. During charging and discharging, Li+ embeds and detach back and forth between the two electrodes: when charging the battery, Li+ is detached from the positive electrode, and then embeds into the negative electrode via the electrolyte, and the negative electrode is in a lithium-rich state; during discharge, the opposite is true. Generally, a battery containing a lithium element is used as an electrode. It is the representative of modern high-performance batteries.
The high discharge rate is representative of the charge and discharge capability of the lithium battery with respect to the ordinary rate. The high-rate battery is divided into a discharge rate and a charge rate, and “C” is used to indicate the ratio of the charge and discharge current of the battery, that is the rate.
a 1200mAh battery, 0.2 C means 240mA (0.2mA of the 1200mAh battery), and 1 C means 1200mA (1 times rate of the 1200mAh battery).
Normally high discharge rate batteries can be fast charged. However, since lithium ions are embedded in the negative electrode graphite during charging, the process of inserting lithium ions into the positive electrode during the discharge process is difficult, so the fast charge rate is generally lower than the discharge rate.
Why do you need high-drain lithium batteries?
High Discharge rate lithium battery have a wide range of applications. High-drain lithium batteries are one of high-drain discharge batteries, mainly including high-rate LiFePO4 batteries and high-rate polymer lithium batteries. They each have their own advantages and disadvantages, so there are overlaps and differences in their application fields. UAV, aircraft model, RC car model and other products all use high-rate lithium batteries. The comprehensive performance and quality of the batteries are excellent. They are well-known brands in the field at home and abroad, and are widely loved by consumers.
If the ordinary battery is fast charged, it is easy to cause lithium stripping of the negative electrode, which leads to an accelerated deterioration of the battery performance. In severe cases, the internal short circuit leads a fire explosion of the battery may occur. Most consumer applications require only 1C of battery, you should choose high discharge battery that if you need higher discharge rates and faster charging times. With the development of various industries, the demand for higher discharge and faster-charging requirements for batteries is increasing constantly.
Advantages of high drain lithium batteries
①It has the characteristics of excellent high-current discharge performance, sufficient explosive power, high discharge platform, and good cycle life.
②It has high energy density and adopts lamination process. Because of its small internal resistance, it is more conducive to rate charge and discharge and high-efficiency output performance.
③It can provide higher discharge rate, up to 45C, better temperature stability during discharge, controlled within 65 degrees Celsius, to prevent overheating and damage.
④The lithium battery is ultra-thin, small in size and light in weight, and can be made into special-shaped batteries of various shapes and capacities. The minimum thickness can be 0.45mm.
High-C lithium battery application
There are three main types of high-rate lithium batteries: lithium iron phosphate batteries, lithium polymer batteries and nickel-metal batteries. The first two are in the form of soft-coated aluminum-plastic film, and the last one is cylindrical in steel shell. These three high-rate batteries are widely used in 3C electronic products, model entertainment, power tools, drones, industrial power supplies and other fields. High-rate batteries are widely praised by people for their excellent comprehensive strength.