 |
Welcome To Evlithium Best Store For Lithium Iron Phosphate (LiFePO4) Battery |
 |
Lithium batteries, especially rechargeable ones, require protection due to their inherent characteristics. The materials used in lithium batteries make them sensitive to overcharging, over-discharging, overcurrent, short circuits, and extreme temperature fluctuations. To safeguard against these risks, lithium battery components are typically equipped with protection circuits and current protectors.
The protection function of a lithium battery is primarily handled by a protection circuit board, alongside components like PTC (positive temperature coefficient) current devices. The protection board, comprised of electronic circuits, continuously monitors the battery's voltage and the current flowing through the charging and discharging circuits. This monitoring is accurate even in extreme temperatures ranging from -40°C to +85°C, allowing the board to control the opening or closing of the circuit as needed. The PTC further protects the battery by preventing damage in high-temperature environments.
A standard lithium battery protection board typically includes a control IC, MOSFET switches, resistors, capacitors, and auxiliary components like fuses, PTC, NTC (negative temperature coefficient) thermistors, ID chips, and memory. Under normal conditions, the control IC keeps the MOSFET switch turned on, allowing the battery to function normally. If the voltage or current exceeds safe limits, the IC switches off the MOSFET to protect the battery from potential damage.
When the protection board is functioning correctly, VDD operates at a high level, while VSS and VM are at low levels, keeping the DO and CO terminals at high levels. If there is a shift in any of these parameters (VDD, VSS, or VM), the levels of the DO or CO terminals will adjust accordingly.
48V lithium batteries come in different types, depending on the materials used. These include ternary lithium batteries, lithium iron phosphate (LiFePO4) batteries, and lithium titanate batteries.
Common applications of 48V lithium batteries include:
Though lithium battery packs are still about twice as expensive as lead-acid batteries, they offer a service life 2-3 times longer. Additionally, lithium batteries are significantly smaller and lighter than lead-acid batteries, making them more desirable in many applications. As a result, lithium batteries are increasingly replacing lead-acid batteries in industries like telecommunications, electric vehicles, and energy storage systems. In particular, governments are encouraging the use of lithium batteries in low-speed electric vehicles to help reduce environmental pollution caused by lead-acid batteries.
Edit by paco