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Sprayer drone is a kind of necessary tool for modern agriculture, which can carry out spraying operation above the crops, effectively improve the utilisation rate of pesticides and the prevention and control effect, and at the same time reduce the input of personnel and materials, and improve the economic benefits of agriculture.Agriculture Drones The sprayer drone is composed of the drone body, spraying system and control system. The main body of the UAV is the skeleton of the UAV, which is made of lightweight materials with high strength, high precision and low weight. The spraying system includes the liquid tank, nozzle and pipeline, etc., which can transport pesticides from the liquid tank to the nozzle through the pipeline, and then spray them onto the crops. The control system includes remote control, positioning system and flight control system, etc., which can realise remote control and automatic spraying of the UAV.Patrol Drones The sprayer drone has a wide range of applications for crops such as fruit trees, rice, wheat, vegetables and so on. It can effectively prevent and control various pests and diseases, and it can also carry out plant protection and plant growth regulator spraying. Sprayer drones spray pesticides more evenly and accurately than traditional artificial spraying, can better control the amount of liquid and the spraying range, avoiding the poisoning and environmental pollution and other problems that may be caused by direct contact with pesticides by personnel.Drone Frames There are many other advantages of sprayer drones, such as: Improve spraying efficiency and prevention and control effects: sprayer drones can complete large areas of spraying operations in a short period of time, improving spraying efficiency and prevention and control effects. Reduced personnel input and cost: using sprayer drones does not require much human resources, which can save a lot of labour costs. Flexibility and adaptability: Sprayer drones are very flexible and adaptable, and can be used for spraying operations on different crops and terrains. Reduced environmental pollution: the use of sprayer drones can avoid problems such as poisoning and environmental pollution that may be caused by the direct contact of personnel with pesticides, which is more environmentally friendly. In short, the sprayer drone is a very important modern agricultural tool, which has improved the efficiency of agricultural production, reduced agricultural costs and environmental pollution problems, and promoted the development of agricultural modernisation.

Since 2018 some company announced the new technology of Semi-Solid Lithium Ion Battery. This is a solution to increase the Lithium Ion battery capatiy and cycle life. And high energy density with light weight. Compare with the traditional Lithium ion batteries it has follow differences: 1-The energy density upto 259Wh/kg, Means the same weight it can storage nore power; 2-Same capacity, It reduced the it's weight. 3-Discharge range improved: Traditional Li-ion batteries usual keep the range from 3.3V to 4.2V /cell. But the Semi-Solid Li-ion battery discharge range from 2.7 to 4.2V. 4-The battery cycle life increased 2X. The traditional battery cycle life usual within 150 times. But Semi Solid Li-ion battery cycle life about 300 times. 5-Semi Solid Battery discharge rate is lower than traditional Li-ion battery. It is only 10C,Meas this battery better for none heavy payload and suit to long time flight Drones. Like the security patrol drones. For example the quad copter drone of JMRRC X1400 ,If the total current more than 100A thn the 6S 16000mAh battery doesn't suit to it. But if we keep the payload less than 10Kg and current less than 100A, this battery will work better anyway. 6-Semi Solid Li Ion Battery safe during transporting and storage. Here is the datasheet for both kinds batteries for comparison. From the datasheet ,We know Semi Solid battery very good for the Drone and UAV which need the long flight time without heavy payload. And the science strives to make things better, We belive the semi solid battery will getting better and cutting the cost. We will see it.

I.The components of Drone Lipo Battery: The lithium batteries used in UAV and Drones: lithium cobalt oxides, we call it Lithium polymer battery. Depend the different materials of the batteries ,There are several systems of lithium batteries:lithium cobalt oxides, lithium cobalt oxides,lithium cobalt oxides, and Ternary material(NCM),And it also has another materials,But the above materials refer to anode materials. II.The features various battery: 1-lithium iron phosphate is too heavy,and with a low voltage,so it's not usually used as a UAV battery. 2-The lithium manganate discharge platform height, but it has its inherent defects. In addition, the discharge rate is low, it's not be used as a UAV battery. 3-The production technology of lithium cobalt oxides is the most mature, and the discharge rate can be increased. It is the best choice for UAV battery, And most of the batteries for Drone and UAV use this. but its disadvantage is too expensive. Even expensive but still use forAgriculture Spraying Drone, Industrial Drone and Racing copters. 4- Ternary material(NCM)is cheaper, but it is made of three different materials, so there will be many mix proportion,such as 3:3:3, which is the best ratio for UAV battery.It also has another ratio like 4:3:3 , 8:1:1 .... ect,that`s means different ratio, different characteristics ,First of all, nickel is the most active (it is the first generation of lithium-ion battery , but all failed because it is too easy to fire and explode) Cobalt activity is slightly less active than nickel, but it is very stable, which is what we call lithium battery.Manganese has low activity, but the structure is stable, the disadvantage is that it will lead to a short life,Such as 8:1:1 refer to nickel 8 cobalt 1 manganese 1, the sort order is nickel,cobalt manganese (or called NCM) Because the ternary material can mix proportion, nickel has large capacity, cobalt is stable, manganese has stable structure and high platform. So you can mix it due to demand. The discharge multiplying power of ternary materials cannot be very high. Manganese always drug their feet. Nickel is too dangerous to be limited. In addition, because it is a mixture, there is no flat platform. See the below figure for the meaning of platform: lithium cobalt oxides battery discharge curve Ternary material(NCM) Battery discharge curve Therefore, the battery with discharge platform has better power durability when flying, and the voltage drop is slower than the ternary battery. In order to solve this problem, many ternary batteries now use the 14s method, which aims to reduce the voltage drop when the discharge reaches half, so as to extend the flight time, but the problem is that the charger needs 14s. Another way is high pressure! But it's only a little higher than a normal battery. The battery we use is 4.2V full charge, and the high-tension battery is 4.3v to 4.35v full charge, but it is basically more than 4.3v. The negative side of high-tension battery is also the requirement of charger, and less security. At the moment DJI MG series use this technology for it`s Smart batteries to get more battery life. III.The discharge limit of UAV battery: According to the data provided in practice, when the discharge at 1C within 95% , the service life will not be affected, which is about charging and discharging cycles. The discharge is about 3-5c in actual use, and in 85% ~ 90% does not affect the service life, and lower discharge will make the service life more than 200 cycles, sometimes around 300 cycles. The life of smart drone battery is longer than that of non-intelligent battery. Because It has the management module with function of self discharge and charging protection. The service life of 12s battery is longer than that of ordinary series 6S battery. Because the whole machine balancing of 12s is better than that of two independent 6S.

When UAV are used for search and rescue or night security patrols, the Searchlights are often used. However, most of the searchlights used by UAV on the market are too low in power and brightness, so they cannot be used for Lighting in a long-distance or a certain altitude.but The UAV searchlight developed and designed by JMRRC has the characteristics of high brightness (up to 6000lm), long irradiation distance and wide irradiation range.The searchlight can also adjust the illumination angle through the remote control, switch the lights remotely, and compatible with the remote control equipment with PWM output. In order to ensure the long working time and the service life of LED lamp beads, the LED lamp tube adopts the all aluminum enclosed shell, and add the double bearing fan for active heat dissipation. The lamp body can prevents rain. It is a professional equipment that is very suitable to be mounted on UAV for patrol, rescue and emergency lighting.