A solar charge controller with load control function

Abstract

The invention discloses a solar charging controller with a load control function, comprising a solar battery delay access circuit, a solar battery open-circuit voltage detection circuit, a battery floating voltage detection circuit, an MPPT maximum power point switching circuit, and a battery charging voltage switching circuit circuit, battery charging circuit, charging management IC chip; battery under-voltage detection circuit, solar start self-locking circuit, load switch circuit and charging state detection circuit; MPPT maximum power point switching circuit generates maximum power point switching signal to the charging management IC chip; The battery charging circuit charges the battery under the management of the charging management IC chip; the solar-powered self-locking circuit obtains the undervoltage detection signal and then delays the time threshold T to control the load switch circuit to supply power to the load. The invention has strong anti-interference ability, does not need programming, and the controller can track the maximum power point of the solar battery panel and control the load switch according to the battery voltage.

Description

technical field [0001] The invention relates to the technical field of solar charge control, in particular to a solar charge controller with a load control function. Background technique [0002] With the rapid development of new energy development technology, more and more devices begin to use solar energy to charge. First, the sun, as an inexhaustible renewable energy source, not only has sufficient cleanliness and absolute safety , the adequacy of resources and potential economy make it an important position in the long-term energy strategy; second, with the continuous development of the Internet of Everything, more and more IoT devices are applied to different regions and different scenarios, some The mains power supply cannot be provided in the scene, and it can rely on the ubiquitous solar energy for energy supply. Therefore, it is more and more important and popular to utilize solar energy as a power source. [0003] The existing solar charging related technologies ...

AI Technical Summary

Problems solved by technology

[0004] 1. The solar controller in the related art has a single parameter, which is set before use, and can only charge one type of battery or can only be connected to one type of solar panel;

[0005] 2. The solar controllers in related technologies use MCU controllers, which will inevitably introduce logic programming

[0007] 3. In related technologies that avoid the use of MCU processors, timers are introduced. This function also increases the complexity of the circuit, and at the same time is susceptible to interference and reduces the reliability of the controller.

[0009] The disadvantage of the prior art is that the solar charging controller is controlled by an MCU processor, which requires software programming, is greatly affected by interference, cannot automatically switch the charging voltage signal according to the voltage level of the battery, and cannot track the maximum power of the solar panel. Point to charge the battery

It does not have a load control function. When the battery is undervoltage, if the load is too large, the load will be turned on and off repeatedly, causing the battery to fail to charge and the load to fail to work normally, and thus enter an endless loop state

Patent No. 201610786879.6 When the load is turned off, the battery voltage tends to be falsely high and the load is turned on again

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