What is LiFePO4 cells?
LiFePO4 cells, also known as Lithium Iron Phosphate cells, are a type of lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the cathode material (the negative side) and a graphite carbon electrode as the anode (the positive side).
3.2V LiFePO4 cells are known for their lower cost, high safety, low toxicity, long cycle life, and other factors. They are finding a number of roles in vehicle use, utility-scale stationary applications, and backup power.
3.2V LiFePO4 battery have the lowest energy density of current lithium-ion battery types, so they aren’t desirable for space-constrained devices like smartphones. However, this energy density tradeoff comes with a few neat advantages.
One of the main advantages of China lithium iron phosphate battery is that they typically offer at least 3000 full charge cycles before they begin to lose capacity. Better quality batteries running under ideal conditions can exceed 10,000 cycles.
Additionally, 3.2 V LiFePO4 battery don’t have nickel or cobalt in them. Both of these materials are rare and expensive, and there are environmental and ethical issues around mining them. This makes LiFePO4 battery 3.2 V a greener battery type with less conflict associated with their materials.
Lastly, LiFePO4 battery 3.2V are inherently more stable than other lithium battery types. They are harder to ignite, better handle higher temperatures and don’t decompose like other lithium chemistries tend to do.
LiFePO4 battery cell types:
Raw LiFePO4 cells can be categorized based on their shape or appearance into three main types:
LFP cylindrical cells are the most traditional and oldest type, and also considered the safest technology.
Due to the round shape, the internal pressure is equally shared on the surface, and heat dissipation is better.
Examples of cylindrical cells include 18650, 26650, 32650, and others.
Prismatic LiFePO4 cells are popular because of their high capacity and square shape.
LiFePO4 prismatic cell is easy to connect in series to create a 12V battery pack.
3.2V LFP Prismatic cells are widely used in energy storage applications.
The main feature of LiFePO4 pouch cells are the aluminum-plastic shell instead of metal, which means they are not as heavy and have a higher energy density than the other two types.
However, they are easier to be damaged and not as strong in impact resistance.
Each type has its own advantages and disadvantages, and the choice depends on the specific application requirements.
