Design Of Small Solar Power Supply System And Battery Charging

Our country is a vast agricultural country,accounts for the population of the world's arable land is the highest in the world,the development of agriculture has decided the lifeblood of our country.Since the 21st century,our country agricultural development is growing by leaps and bounds,with the development of intelligent irrigation is more visible,intelligent irrigation has solved the past only depend on the resources of traditional farming slow,unreasonable planning,the dependence of big issues such as to people.Not only saving the water resource is greatly improving the crop production.But merely to ensure that food production is not enough,to scientists and puts forward the precision agriculture,health,it put forward is dedicated to ensure food quality.In precision agriculture,the most widely used is the intelligent irrigation system based on Internet of things,it is compared with the traditional intelligent irrigation data more,and then analyzes the implementation of irrigation to a larger database.This needs in many places set up to collect and irrigation system,each system requires constant power supply,and in the earth to make each patch grid electricity is clearly does not conform to the actual.The purpose of this paper is to solve the intelligent irrigation system based on the Internet of things of the power supply system design.This system adopts the independent photovoltaic power generation system,solar power is not used directly but the battery recharged,battery in continuous power supply for the whole system.So there will be many problems:on the one hand,as a result of the solar energy utilization rate is low,and solar power output instability point,cause the battery is easy to miss the best time.Application,on the other hand,unable to make full use of the solar photovoltaic system down again after conversion of electricity to make the solar energy utilization,combined with the external environment and make the battery charge control control harder,so as to damage the battery also greatly weakened the service life of the solar system.So,increasing the light input and full use of the solar photovoltaic battery change of electricity,to solve the intelligent control of small solar power supply system of storage battery charging and discharging research has important strategic significance.Based on photovoltaic solar panels similink simulation test to verify the light intensity affect the solar power generation,and depending on the day the sun set straight Angle designed two-axis sun tracking system,the system work in a three-dimensional coordinate system,through the rotation of the two motors,making solar panels with vertical illumination direction,thereby the maximum increase lighting time and light intensity.And then the DC/DC to achieve maximum power tracking(MPPT)and combined with a three-stage charging strategy designed to charge and discharge controller,avoiding the service life of the battery caused by high current low problem,at the same time because the battery can charge under the maximum power point,increase the speed of the storage battery charging.To maintain the lasting power of the entire system at the same time,based on the Internet of things in intelligent irrigation system achieved good effect.