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What are LFP (Lithium Iron Phosphate Batteries)?

发布者:奥科新能源      时间:2019-07-03
Lithium Iron Phosphate (LiFePO4) batteries use a new type of cathode material that provides several advantages over traditional Li-ion batteries based on LiCoO2. LiFePO4 batteries provide much higher specific capacity, superior thermal and chemical stability, enhanced safety, improved cost performance, enhanced charge and discharge rates, compact size, light weight, and enhanced cycle life.  LiFePO4 batteries can offer a cycle life of potentially 2,000-3,000 charge cycles. Typical LFP batteries have an average lifetime of between 5 to 10 years and can be expected to deliver reliable and consistent performance throughout its service life. The characteristics AUKPOWER batteries are proven to offer are as such:
-Enhanced safety
-Exceptional low temperature performance
-Enhanced 2000-3000+ charge cycles
-Enhanced 5-10+ years service life
-High abuse tolerance
-High capacity - a Bioenno Power LFP will generally outperform an SLA with twice its Ah rating. 
-High rate capability
-High temperature performance  
-Chemical and Thermal stability 
-Flat, consistent discharge
-No Memory Effect
-Full depth discharge 
-No need for tendering of floating
LiFePO4 batteries themselves come in two distinct types as determined by cell type:

Deep Cycle LiFePO4: essentially the distinction boils down to the amount of lithium present in each cell and the intended application which in this case is to power electronics for long periods of time. This type is designed with capacity in mind and at its heart stores lots of power in a very small package and as such has more lithium per cell. A deep cycle battery of this chemistry will not be able to crank your engine. 
High Rate LiFePO4: these are for starting motors only, the difference being that this type has dramatically lower lithium content per cell. However, the lower lithium quantity is not an issue because by design this type is only intended to output large bursts of energy for a short amount of time. As such, this type does not need that much lithium. While this type can be mistakenly used for a deep cycle application, doing so incurs significant risk as the high current rating has a high likelihood of damaging your load. These batteries are easy to identify because they have two distinct characteristics: A) a Lead Acid Equivalent Figure and B) have a CCA (Cold Cranking Amp) Rating. 
These two types are not to be confused or interchanged. While a High Rate will be able to power electronics, it will only do so momentarily as they by design do not have the storage capacity needed for extended use. Moreover, the high current ceiling will not mitigate current spikes the occurrence of which will damage your equipment. If you are powering equipment, you require Deep Cycle Batteries. If you are starting motors or powering your flash on your camera, the High Rate is the one for you. Remember the following rule of thumb:

Deep cycle/deep discharge and high rate/starter are two different batteries even if they are from the same chemistry. This holds true for all battery types, even Lead Acid/SLA/GEL/AGM. A battery is either for deep cycle or for starting, never both despite any claims which may be made so make sure to double check your application and confirm your requirements before purchase.