zwaynenergy Datasheet-48-Volt-lithium-iron-phosphate-batteries-Smart-EN202106

Why lithium-iron-phosphate?

Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of a LFP cell is 3.2V (lead-acid: 2V/cell). A 48V LFP battery therefore consists of 16 cells connected in series. 

Rugged

A lead-acid battery will fail prematurely due to sulfation: 

● If it operates in deficit mode during long periods of time (i.e. if the battery is rarely, or never at all fully charged). 

● If it is left partially charged or worse, fully discharged (in yacht or mobile home during winter time). 

A LFP battery does not need to be fully charged. Service life even slightly improves in case of partial charge instead of a full charge. This is a major advantage of LFP compared to lead-acid. Other advantages are the wide operating temperature range, excellent cycling performance, low internal resistance and high efficiency (see below). 

LFP is therefore the chemistry of choice for very demanding applications. 

Efficient

In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance. The round trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead- acid battery is 80%.The round trip energy efficiency of a LFP battery is 92%. 

The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiency of 50% or even less in solar systems where several days of reserve energy is required (battery operating in 70% to 100% charged state). In contrast, a LFP battery will still achieve 90% efficiency under shallow discharge conditions. 

Size and weight

Saves up to 70% in space 

Saves up to 70% in weight

Expensive?

LFP batteries are expensive when compared to lead-acid. But in demanding applications, the high initial cost will be more than compensated by longer service life, superior reliability and excellent efficiency

Our LFP batteries have integrated cell balancing. Up to 12 batteries can be paralleled connected, so that a 48V battery cabinet of up to 2400Ah can be assembled. 

Battery Management System (BMS)

The BMS will: 

1. Disconnect or shut down the load whenever the voltage of a battery cell decreases to less than 2,5V.
2. Stop the charging process whenever the voltage of a battery cell increases to more than3,65V.
3. Shut down the system whenever the temperature of a cell exceeds 50°C.
4. Automatic cell balancing and current limit when the batteries voltage have big gap when paralleled.
5. Anti-reverse connection.
6. Compatible with SMA, Victron, Grottwatt, UZ, Sola-X, Sinxcel, Sungrow, DEYE, etc. inverters

Genixgreen Datasheet-48-Volt-lithium-iron-phosphate-batteries-Smart-EN202106.pdf