Photoelectric integrated street lamp control device and method

Abstract

The invention discloses a photoelectric integrated street lamp control device and method. The device comprises an MCU processing circuit used for implementing a charging control function, a solar panel voltage detecting circuit and a lithium battery charging and discharging power detecting circuit. The MCU processing circuit is connected with an LED constant current driving circuit, a solar paneldischarging circuit and a lithium battery charging and discharging circuit. The method comprises steps to implement the charging control function. The method comprises steps that different charging modes are selected according to the solar panel voltage, the remaining battery power and the internal battery temperature, and a corresponding first PWM signal is output to the solar panel discharging circuit to charge a lithium battery according to the selected charging mode. According to scheme of the invention, the charging speed and efficiency are improved; the problem of low charging efficiencycaused by the inability to fully utilize the sunlight for fast charging during use is solved; the energy utilization is maximized; and the device and method are widely applicable to the field of LEDlamp control.

Description

technical field [0001] The invention relates to light control technology, in particular to a photoelectric integrated street lamp control device and method. Background technique [0002] Explanation of technical terms: [0003] MCU: Microcontroller Unit, micro control unit, also known as single-chip microcomputer or single-chip microcomputer. [0004] PWM: Pulse Width Modulation, pulse width modulation. [0005] ISP: In-System Programmability, programmable in the system. [0006] LED: Light Emitting Diode, light emitting diode. [0007] EEPROM: Electrically Erasable Programmable read only memory, electrically erasable programmable read-only memory. [0008] ADC: Analog-to-Digital Converter, analog-to-digital converter. [0009] MOS tube: Metal-Oxide-Semiconductor Field-Effect Transistor, is the abbreviation of MOSFET, a metal oxide half-field-effect transistor. [0010] As a green and environmentally friendly photovoltaic industry supported by the state, it has been wi...

AI Technical Summary

Problems solved by technology

However, according to the performance characteristics of the battery, it is unreasonable to use the constant current charging method or the constant voltage charging method. Most of the current is used for electrolyzing water. At this time, the electrolyte will produce too many bubbles and appear to be boiling. This not only consumes electric energy, but also easily causes a large amount of active substances on the plate to fall off. The temperature rise is too high, causing the plate to bend and the capacity For the constant voltage charging method, the current is too large at the initial stage of charging, resulting in the same problem as the later stage of the constant current charging method. The volume change and shrinkage of the electrode active material is too fast, which affects the mechanical strength of the active material, causing In addition, at the later stage of charging, when the battery voltage is equal to the charging voltage, the charging current is reduced to a minimum or even zero, which prevents the active material in the deep part of the electrode plate from receiving a charging reaction, resulting in long-term insufficient charging, which affects the service life of the battery

Although the constant voltage and constant current charging method makes up for the shortcomings of the above two charging methods, it has problems such as slow charging speed, low charging efficiency, insufficient flexibility, and inability to fully utilize energy in combination with product requirements.

Therefore, it can be seen that the currently commonly used charging methods are not well combined with the characteristics of the battery for charging and practical application, and there are problems such as slow charging time, not making good and full use of solar energy, resulting in energy waste and other problems.

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