Choosing the appropriate energy storage power battery for RVs and Marines

RVs and Marines are mobile living spaces with very limited space and capacity, so it is necessary to choose a suitable backup power supply (energy storage battery) to improve the quality of life in the mobile space.

Lead-acid batteries and lithium-ion batteries

At present, there are two kinds of energy storage materials commonly used in small functional energy storage systems, one is lead-acid batteries and the other is lithium-ion batteries.

Among them, lithium-ion batteries can be divided into square batteries, soft pack batteries and cylindrical batteries.

Lithium-ion batteries are currently mainstream lithium iron phosphate batteries, ternary material batteries, etc. refer to lithium-ion batteries with lithium iron phosphate and ternary material as the cathode material, respectively. Ternary materials refer to Ni, Co, Mn or Ni, Co, Al three metal elements as the core element of the cathode material.

The energy density of lithium iron phosphate battery is 120Wh/kg and 80Wh/kg after grouping, while the energy density of ternary lithium battery is 180Wh/kg and 110Wh/kg after grouping. After the battery is formed into a group, due to the harsh and complex working conditions, the life will be reduced to a certain extent.

Cycle life of Lead-acid battery, ternary lithium battery and Lithium battery

The energy density of lead-acid battery, ternary lithium battery and lithium iron phosphate battery are 40Wh/kg, 100Wh/kg and 80Wh/kg respectively, and the weight per kWh is 25kg/Kwh, 10kg/Kwh and 12.5kg/Kwh respectively, and the cycle life is 500 times, 3000 times and 3000 times respectively.

The RV is designed according to the backup power of 10 degrees, the lead-acid battery needs 250kg, and the ternary and lithium iron phosphate batteries are about 100kg and 125kg respectively. Obviously, lead-acid batteries are not suitable as backup power for mobile transportation, comprehensive environmental protection, safety and other factors, ternary lithium batteries and lithium iron phosphate are good choices.