Solar lamp controller parameter settings

The setting of the float voltage parameter has a very important impact on the battery life. The amount of current generated by the float voltage should be sufficient to compensate for the self-discharge and daily load usage and to maintain the oxygen cycle. Unreasonable float voltage mainly affects the battery in two aspects, namely the positive grid corrosion rate and the gas discharge in the battery. When the float voltage of the battery exceeds a certain value, the corrosion of the grid will further increase. The oxygen and hydrogen in the battery will generate a higher pressure and be discharged through the exhaust valve, thereby causing the battery to lose water. Positive electrode corrosion means that the battery loses water, which further exacerbates battery degradation and shortens its life. If the float voltage exceeds a certain level, the increased float current will generate more surplus gas, which will hinder the recombination of oxygen at the negative electrode and weaken the oxygen circulation function.

Balanced charging is to prevent some batteries from being supplemented by the inconsistent capacity and terminal pressure. The general practice is to pressurize the float charge 0.05~0.07V, but the maximum should not exceed 0.35V. Since the amount of gas generated during balanced charging is several tens of times larger than that of floating charging, the charging time cannot be too long to avoid surplus gas affecting the recombination efficiency of oxygen and increasing the loss of water, thereby increasing the corrosion rate of the grid. , damage the battery. For a new battery or a battery with a better state, the voltage should be relatively low for balanced charging, and the charging voltage for a battery with a longer operating life or poor performance can be increased.

Now the general lighting system controller, over-discharge point voltage value is set at 10.8V, but the actual lamp system, the discharge current is generally about 0.01C ~ 0.02C, and some even smaller, in this discharge case, when the discharge To reach the termination voltage of 10.8VB-inch, the battery has been discharged, which will seriously affect the battery life.

A large number of research results at home and abroad show that the charge-discharge mode determines the lifespan of the battery, and some batteries are not so bad as to say that they are not properly damaged.