Several solar battery charging and discharging mode

1, direct charge point voltage: straight charger also called quick charger, belong to the quick charge, typically in the low storage battery voltage large current and relatively high voltage of battery charging, however, there is a control point, also known as the guard point, is the value in the table above, when

1, straight charge point voltage: straight charger also called quick charger, belong to the quick charge, typically in the low storage battery voltage large current and relatively high voltage of battery charging, but there is a control point, also called guard point, is the value in the table above, when charging the battery terminal voltage is higher than the protection value, should stop charging. Direct charge point voltage is also commonly point '' as the overcharge protection voltage, charging voltage of the battery cannot be higher than that of the guard point, otherwise it will cause of charging, the battery is damaged. 2, all charge control point voltage: straight after the charge, LED street lamp, battery will generally be charging and discharging controller let stand for a period of time, make its voltage natural whereabouts, the moment into the recovery voltage value, will enter the state of charge. Why want to design all charge? When straight after the charge, there may be individual battery 'backward' ( Voltage of relatively low) Individual molecules, in order to put these back, make all the voltage of the battery has a uniform consistency, so will by the high voltage with moderate current charge again for a moment, is the so-called filling, namely 'equalizing charge'. All filling time shoulds not be too long, generally for a few minutes to ten minutes, time setting too long harmful. Equipped with a piece of two pieces of small battery system, are filled. So, street light controller should generally do not set all, only two phases. 3, floating control point voltage: generally is all finished, battery was also stand for a period of time, make its voltage across the natural, when falling to 'maintain voltage', floating in and now adopts PWM ( Both pulse width modulation) Way, similar to 'trickle charge' ( The small current charging) , low battery voltage is charged on a bit, filled with a little low, the a shares to, in order to avoid the battery temperature rising, this is good for the battery, because the battery internal temperature had a great influence on charging and discharging. Actually PWM mode is primarily designed to stabilize the real time voltage of the battery, by adjusting the pulse width to reduce the battery charging current. This is a very scientific management system. Specifically, in the late charge battery remaining capacity ( SOC) > 80%, it is necessary to reduce the charging current, in order to prevent too much outgassing by charging ( Oxygen, hydrogen and acid gas) 。 4, discharge termination voltage protection: it is better to understand. Battery discharge cannot be lower than this value, this is the rules of the national standard. Although battery manufacturer has its own protection parameters ( Business line or logo) , but ultimately want to national standard. It is important to note that in order to be on the safe side, generally put protection point the 12 v battery voltage with 0. 3 v as the zero drift correction of temperature compensation and control circuit, so the 12 v battery discharge protection point voltage is 11. 10 v, 24 v system put protection point voltage is 22. 20V。 At present a lot of manufacturer of charging and discharging controller is 22. 2V( 24 v system) Standard.