The Victron Lithium 12.8V/100Ah LiFePO4 Smart battery is based on Lithium Iron Phosphate (LiFePO4 or LFP) technology, the safest among lithium-ion battery types.
The Victron Smart LFP batteries have integrated cell balancing and cell monitoring. This allows information about cell voltage and temperature of the battery to be read out and checked with the Victron Connect Bluetooth app. This information is passed through two cables to an external Battery Management System for integration with other system components.
The Victron 12.8V/100Ah Smart lithium iron phosphate battery has a maximum continuous discharge current of 200A, and is equipped with built-in Bluetooth functionality for reading the integrated cell balancing and cell monitoring. The battery is equipped with cables with connectable M8 plugs that can be connected together in a daisy chain. Allows the battery to be connected to an external battery management system (Battery Management System, BMS). Up to 5 batteries can be connected in parallel and up to 4 batteries can be connected in series.
Battery Management System (BMS)
The VE.bus BMS is connected to the communication cables with connectable M8 plugs. The main functions are:
> Disconnects or switches off the load when the voltage of a battery cell falls below 2.5V.
> Stops the charging process when the voltage of a battery cell exceeds 4.2V.
> Shuts down the system when the cell temperature exceeds 50°C.
Why Lithium Iron Phosphate?
Lithium Iron Phosphate (LiFePO4 or LFP) is the safest of the major lithium-ion battery types. The nominal voltage of an LFP cell is 3.2V (lead-acid: 2V/cell). A 12.8V LFP battery therefore consists of 4 cells connected in series; and a 25.6V battery consists of 8 cells connected in series.
Robust
A lead-acid battery will fail prematurely due to sulfation:
• When operating in shortage mode for extended periods (when the battery is seldom or never fully charged).
• If stored partially charged, or worse, fully discharged (in a yacht or mobile home during the winter).
An LFP battery does not need to be fully charged. The lifespan is even slightly longer by partially charging the battery instead of fully. This is a major advantage of LFP over lead acid. Other benefits include wide operating temperature range, excellent cycle performance, low internal resistance and high efficiency (see below). LFP is therefore the right choice for very demanding applications.
Efficient
Energy efficiency can be essential in various applications (particularly in autonomous solar and/or wind energy). The energy efficiency cycle (discharged from 100% to 0% and charged back to 100%) of the average lead-acid battery is 80%. The energy efficiency cycle of an LFP battery is 92%. The charging process of lead-acid batteries becomes particularly inefficient when the state of charge reaches 80%, resulting in efficiencies of 50% or even less in solar systems requiring several days of reserve power (battery that is charged at 70% to 100% state of charge). works). However, an LFP battery still has an efficiency of 90% at light discharges.
Comparison with lead-acid batteries
LFP batteries are more expensive compared to lead-acid batteries. But in demanding applications, the high initial cost is more than offset by the longer life, superior reliability and outstanding efficiency. An LFP battery saves up to 70% in space and is up to 70% lighter in weight.
bluetooth
With Bluetooth, cell voltages, temperature and alarm status can be monitored. Very useful to locate (potential) problems, such as cell imbalance.
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