What factors determine the service life of Panasonic battery?
It's not particularly clear which factors determine the service life of Panasonic battery, so let's have a detailed introduction today!
1. The influence of assembly pressure of Panasonic battery
Assembly pressure has a great influence on the life of Panasonic battery. The elasticity of AGM separator is poor. During assembly, the electrode group is not pressurized or the pressure is too small, and the good contact between the separator and the electrode plate cannot be maintained, which will lead to a significant decrease in battery capacity.
During the cycle, the expansion, looseness and falling off of the active material is one of the reasons for the early end of the battery life, and the higher assembly pressure can prevent the expansion of the active material in the deep cycle. If the assembly pressure is too low, the separator will be separated from the electrode plate prematurely, which will cause the difficulty of electrohydraulic transmission and the rapid increase of the internal resistance of the battery, which will easily lead to the end of the battery life. Therefore, high assembly pressure is the guarantee of long cycle life.
2. The influence of Panasonic battery temperature
High temperature can accelerate the loss of water, loss of control of heat, corrosion and deformation of positive grid, low temperature will cause negative failure, temperature fluctuation will accelerate dendrite short circuit, etc., which will affect the battery life. When the battery is discharged in a certain range of ambient temperature, the capacity increases with the increase of temperature and decreases with the decrease of temperature. In the range of 10 ℃ ~ 45 ℃, the capacity of lead-acid battery increases with the increase of temperature. For example, the discharge capacity of VRLA battery at 40 ℃ is about 10% higher than that at 25 ℃. However, if it exceeds a certain temperature range, on the contrary, if it is discharged at 45 ℃ ~ 50 ℃, the capacity of the battery decreases obviously. At low temperature (< 5 ℃), the capacity of battery decreases with the decrease of temperature. When the temperature of electrolyte decreases, the viscosity of battery increases, the ion movement suffers great resistance, and the diffusion ability decreases. At low temperature, the resistance of electrolyte also increases, and the resistance of electrochemical reaction increases, resulting in the decrease of capacity of battery. Secondly, low temperature will lead to the decrease of the utilization rate of negative active substances, which will affect the capacity of the battery. For example, when the battery is discharged at - 10 ℃, the capacity of negative plate is only 35% of the rated capacity.