What is 48 volt lithium battery?

Generally, the single battery on the market is about 3.7V, but in many cases, the operating voltage range is slightly larger, which obviously has the problem of insufficient voltage. At this time, can increase the battery voltage of battery packs and modular batteries will follow, in many high voltage batteries, 48 volt lithium battery has been widely used.

structure of lithium battery

48 volt lithium battery charger

It is specially used to charge lithium batteries with a nominal voltage of 48V. Lithium batteries have higher requirements for chargers and need protection circuits, so lithium battery chargers usually have higher control precision and can charge lithium batteries with constant current and voltage. The lithium battery charger has the functions of overvoltage protection and temperature protection. It is externally connected with a current-limiting charging power supply and a P-channel field effect transistor, which can safely and effectively charge a single lithium battery.

Its significant feature is that it does not use, in the case of inductance can still achieve low power, and the use of 8-pin μMAX package. Charging control accuracy is 0.75%, which can realize pre-charging, limit the maximum charging time and provide secondary protection for lithium batteries. The floating charging method adopted by the lithium battery charger can maximize the battery capacity.

The 48 volt lithium-ion battery protection board

It is a circuit board that plays a protective role. It is mainly composed of electronic circuits. It can accurately monitor the voltage of the cell and the current of the charging and discharging circuit under the environment of -40℃ to +85℃, and control the on and off of the current circuit in time.

The lithium battery protection board can protect the battery string and parallel battery string from charge and discharge. It can detect the overvoltage, overcurrent, overtemperature, undervoltage, and short circuit of each battery in the battery string to prolong the battery life and avoid battery damage caused by over discharge. Maxworld lithium battery protection plate is an indispensable part of lithium battery.

48 volt lithium battery management system (BMS)

It determines the status of the entire battery system by detecting the status of the individual cells in the lithium battery pack, and performs corresponding control adjustments and strategy implementations on the lithium battery system according to their status, to achieve the lithium battery system and the charge and discharge management of each cell are used to ensure the safe and stable operation of the lithium battery system.

Precautions for 48V Li-ion Battery Charging

  • Charge in strict accordance with standard time and procedures.
  • Lithium batteries are generally in a charged half-charged state when they leave the factory, and the battery must be fully charged for the first use.
  • Use the original charger, the original charger has strong supporting performance and moderate charging rate.
  • Don’t often use it to charge when the undervoltage protection circuit works. The concept of completely discharging the electricity and then recharging is incorrect. The greater the depth of discharge, the more times the battery is used at a loss of electricity, and the shorter the service life of the lithium battery.

Comparison of 48 volt lithium battery and lead-acid battery

Compared with lead-acid battery, 48 volt lithium batteries has the following advantages: small size, light weight, strong temperature adaptability, high charging-discharge efficiency, safety and stability, long service life, energy saving and environmental protection. 48 volt lithium battery can also be divided into ternary lithium battery, iron phosphate lithium battery and lithium titanate battery according to cathode material.

1 Weight energy density

Now, the energy density of lithium batteries is around 200~260wh/g, lead acid is 50~70wh/g, and the weight energy density of lithium batteries is 3~5 times that of lead acid, which means that under the same weight, the capacity of lithium batteries is higher than that of lead. Lead acid batteries are three to five times stronger, There, lithium batteries have an absolute advantage in energy storage.

2 Volume energy density

Since the volumetric energy density of lithium batteries is usually about 1.5 times that of lead-acid batteries, under the same capacity, lithium batteries are about 30% smaller than lead-acid batteries.

3 Service life

At present, the most popular lithium battery materials are ternary lithium and iron lithium. For example, a ternary lithium battery usually has 1000 cycles, a lithium iron phosphate battery has more than 2000 cycles, and a lead-acid battery usually has 300-350 cycles. Then it shows that the life of lithium batteries is about 3-6 times that of lead-acid batteries.

4 Price cost

Lead-acid batteries are currently cheaper than lithium batteries, which are about three times more expensive than lead-acid batteries. However, through service life analysis, if the same cost is used, the life of lithium batteries is longer.

5 Environmental protection

Lead-acid batteries are seriously polluted, and lithium batteries are relatively greener in terms of production and recycling.


In conclusion,48 volt lithium battery has its own unique advantages and multiple applications. The matching of charger and battery can better ensure battery performance and prolong service life. You can buy batteries with guaranteed quality according to your needs and budget.  

At last, If you want to know more about the 48 volt battery meter wiring diagram, 48v golf cart battery wiring diagram and club car ds 48v battery diagram, Feel free contact our Maxworld team.