What is the principle of solar lawn light control?

The control principle of solar lawn light mainly revolves around the charge and discharge controller. The controller consists of a photovoltaic panel, a storage battery, a solar controller and a load. Switches K1 and K3 control the charging state, while K3 controls the discharge. The logic of the controller is determined by the circuit according to the charge and discharge state, and controlled by voltage comparison, boost charging circuit, light control circuit or voltage hysteresis comparator composed of integrated operation amplifier. Considering the cost, simple circuit scheme is used.

In the protection section, the controller has several key charge and discharge protection modes. The direct-charge protection point voltage is used for fast charging. When the battery voltage is low, high current and relatively high voltage are used to charge the battery. However, stop charging when the battery terminal voltage reaches the protection value to avoid overcharging the battery. Equalized charge control point voltage After direct charge, the individual battery is charged evenly through high voltage and moderate current to ensure the voltage consistency of all batteries, usually lasting a few minutes to more than ten minutes. Floating charge control point voltage after equalized charge, through PWM mode, to keep the battery voltage stable, avoid the battery temperature is too high, which is beneficial to the battery. Overdischarge protection Stop voltage limit the battery discharge cannot be lower than this value to ensure battery safety.

In summary, the controller of the solar lawn lamp ensures the efficient and safe use of the battery through accurate charge and discharge management. Direct charge protection, equal charge, floating charge and overdischarge protection modes work together to ensure that the battery is in the best working condition and extend the service life. Cost considerations and protection mechanisms are set to achieve efficient and reliable operation of solar lawn lights.

Extended data

Solar lawn lights are composed of solar cell modules (photovoltaic panels), ultra-bright LED lights (light sources), maintenance-free rechargeable batteries, automatic control circuits, lamps and other components. It mainly uses the energy of solar cells to work, when the sun shines on the solar cells during the day, the light energy is converted into electrical energy stored in the battery, and then the battery provides power for the LED (light-emitting diode) of the lawn lamp at night. Its main advantages are safety, energy saving, convenience, environmental protection and so on. Suitable for residential community green grass landscaping lighting embellishment, park lawn landscaping embellishment.