51.2V 100AH Lithium Battery VS 48V 100AH Lithium Battery
We can see a lot of 100AH Lithium Battery in market with 48V or 51.2V,let’s see what is the difference between those two voltage.
1.In terms of electrical performance
Output voltage: The output voltage of a 51.2V 100AH lithium battery is 51.2V,and the output voltage of a 48V 100AH lithium battery is 48V,for some equipment or systems with high voltage requirements, such as certain industrial equipment,high-end communication base stations,etc.,a voltage of 51.2V may be required to ensure their normal operation and performance;and 48V batteries are more common in some conventional energy storage systems, electric vehicles,etc.
Energy storage and output: According to the formula (energy(E)=voltage(V) × current(C) × time(T),under the same capacity of 100AH,51.2V lithium battery theoretically stores 51.2 × 100=5120Wh of energy,and a 48V 100AH lithium battery stores 48 × 100=4800Wh of energy,51.2V battery can provide more energy and support the operation of devices with higher power or longer power supply time for the same device under the same power supply time.
Charge and discharge characteristics:The charging cut-off voltage of 51.2V lithium battery is usually higher than that of a 48V lithium battery,for example,the charging cut-off voltage of 51.2V lithium iron phosphate battery may be around 58.4V,while the charging cut-off voltage of 48V lithium iron phosphate battery is generally around 54.6V,the discharge cut-off voltage also varies,with 51.2V lithium batteries generally having a relatively lower discharge cut-off voltage,under the same charging and discharging current,the 51.2V battery has a higher charging and discharging power.
2.In terms of application
51.2V 100AH lithium battery: Commonly used in scenarios that require high voltage,large capacity energy storage,and relatively sufficient space,such as large energy storage power stations,some demanding industrial energy storage systems,etc,it can also be applied to equipment that requires higher voltage platforms to improve system efficiency and power output,such as certain special vehicles,high-end robots, etc.
48V 100AH lithium battery: More widely used,commonly found in home energy storage systems,electric bicycles,small solar energy storage systems,backup power sources for communication base stations,etc,these scenarios have relatively lower voltage requirements and place more emphasis on universality and cost-effectiveness.
3.In terms of battery pack structure
Number of series connected cells: Taking commonly used lithium iron phosphate batteries as an example,the nominal voltage of a single lithium iron phosphate battery is generally 3.2V. A 51.2V lithium battery pack is usually composed of 16 battery cells connected in series,while a 48V lithium battery pack is usually composed of 15 battery cells connected in series.
Battery Management System (BMS): Due to different voltages,there may be differences in the design and parameter settings of the two BMS systems,the BMS of a 51.2V lithium battery needs to adapt to a higher voltage range,and the setting of protection thresholds for overvoltage,undervoltage,etc, may be different from that of a 48V BMS,there may also be differences in strategies for balancing management to ensure the safety and performance of the battery pack.
4.Cost and price aspects
Material cost: 51.2V 100AH lithium batteries have relatively high material costs due to the need for more battery cells in series and the possibility of using more complex BMS.
Market price: In the market,51.2V 100AH lithium batteries are generally more expensive than 48V 100AH lithium batteries,the specific price differences may vary due to factors such as brand,quality,and craftsmanship.