100Ah 12.8V Lithium Battery - Smart - Victron Energy

Description

< p style="text-align: justify;" >< strong >Why lithium iron phosphate batteries?< /strong >< br />Lithium iron phosphate batteries (LiFePO4 or LFP) are the safest among traditional lithium-ion batteries. The nominal voltage of an LFP cell is 3.2 V (lead: 2 V/cell). An LFP 12.8 V battery consists of 4 cells connected in series, and a 25.6 V battery consists of 8 cells connected in series.< /p> < p style="text-align: justify;" >< strong >Robust< /strong >< br />A lead-acid battery will prematurely fail due to sulfation:< /p> < ul style="text-align: justify;" > < li >If it operates in deficit mode for extended periods (meaning the battery is rarely or never fully charged).< /li> < li >If it is left partially charged, or worse, fully discharged (for yachts or mobile homes during winter).< /li> < /ul> < p style="text-align: justify;" >It is not necessary to fully charge an LFP battery. Its lifespan even slightly improves with partial charging instead of a full charge. This is a major advantage of LFP batteries over lead-acid batteries. These batteries also offer other benefits such as a wide operating temperature range, excellent cycle performance, low internal resistance, and high efficiency (see below). An LFP battery is therefore the top choice chemistry for highly demanding applications.< /p> < p style="text-align: justify;" >< strong >Efficient< /strong >< br />For several applications (especially autonomous solar and/or wind applications), energy efficiency can be crucial. The round-trip energy efficiency (discharge from 100 % to 0 % and back to 100 % charged) of an average lead-acid battery is 80 %. The round-trip energy efficiency 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 when several days of reserve energy are needed (battery operating with a state of charge from 70 % to 100 %). In contrast, an LFP battery will reach 90 % efficiency under light discharge conditions.< /p> < p style="text-align: justify;" >< strong >Size and weight< /strong >

< ul style="text-align: justify;" > < li >70 % space savings.< /li> < li >70 % weight savings.< /li> < /ul> < p style="text-align: justify;" >< strong >High price?< /strong >< br />LFP batteries are very expensive compared to lead-acid batteries. But for demanding applications, the high initial cost will be more than offset by a longer lifespan, superior reliability, and excellent efficiency.< /p> < p style="text-align: justify;" >< strong >Bluetooth< /strong >

< p style="text-align: justify;" >The status of temperature alarms and cell voltages can be monitored via Bluetooth. This is a very useful feature for locating potential problems, such as cell imbalance.< /p> < p style="text-align: justify;" >Our LFP batteries are equipped with balancing and cell monitoring functions. Up to 5 batteries can be installed in parallel and up to 4 batteries can be connected in series: thus, a 48 V battery bank of up to 1500 Ah can be assembled. The balancing/monitoring cables can be connected in series, and they must be connected to a Battery Management System (BMS).< /p> < p style="text-align: justify;" >< strong >Battery Management System (BMS)< /strong >< br />The BMS is connected to the BTV and its main functions are: 1. Disconnect or turn off charging whenever a battery cell voltage drops below 2.5 V. 2. Stop the charging process whenever a battery cell voltage exceeds 4.2 V. 3. Turn off the system whenever a cell temperature exceeds 50 ºC. See the BMS technical datasheets for more functions.< /p>