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The use of high pole lights meets the actual needs of urban lighting and can perform specific lighting tasks. As a result, this type of lamp has found good applications. It is currently equipped with a protection mode, but how does it work?
1. Direct Charging to Maintain Point Voltage
Direct charging, also known as emergency charging, is a form of fast charging. Generally, when the battery voltage is low, it will charge at a high current and relatively high voltage. However, there is a control point called the maintenance point. The voltage maintained during direct charging is also referred to as the voltage of the “overcharge maintenance point.” The terminal voltage of the battery during charging should not exceed the maintenance point. Otherwise, overcharging will occur, which is harmful to the battery.
2. Voltage Control for Balanced Charging
After completing direct charging, the battery is set by the charging and discharging controller to a certain period, during which the voltage naturally decreases. Once the battery voltage drops to the recovery voltage value, it enters the same charging state. The uniform rate is also known as the “balanced rate.” An excessively long average charging time is not acceptable, typically lasting a few minutes to more than ten minutes; an extended setting period can be detrimental. In small systems equipped with one or two batteries, balanced charging is nearly meaningless. As a result, solar street lamp controllers usually follow only two steps.
3. Over-Discharge Maintenance Termination Voltage
Battery discharge must exceed national standards. Battery manufacturers have their own maintenance parameters, but they should still align closely with national standards. For safety reasons, the over-discharge maintenance point voltage for a 12V battery is typically adjusted for control circuit temperature correction or zero drift correction.
It is through this mode that adequate protection is provided for the operation of this lamp, ensuring that high pole lights can be used more safely.
