4s 14.8 V Lipo Battery 4s 16000mah 25C Electric Aircraft High Rate Discharge

Fullymax 14.8V 16000mAh 4cell 25C lipo Battery electric aircraft High Rate Discharge Li-Po Battery

Fullymax high capacity batteries provide high quality, reliable power for your RC,eVTOL,Quadcopter,Multirotor,Hexacopter,etc.

With vision of 'Become a global leading new energy enterprise with high rate discharge battery as the core', Fullymax focus on supplying power to drone, UAV, Multirotor, UAS, eVTOL or Aircraft. Dedicating to providing better flight power and longer time, Fullymax has been has been continuously putting great efforts in technology research & development and constantly breaking through ourselves to bring you better products and experiences.

All Fullymax UAV LiPos are packed with vibration-proof & fire-proof material and packed with battery carton ensuring you get your battery in good condition.

Capacity&Leadtime

● Stacking/per day:50Kpcs

● Winding/per day:5,00Kpcs

● Regular Model:≤8 weeks

● Customized:16-18 weeks(The first order, if nonew facility added )

Quality Management Syste

• Quality management systems Requirements for Aviation
• ISO9001 Quality Management System
• ISO14001 Environmental Management System

• Hazardous Substance Process Management System
• Occupational Health And Safety Management System

Safety and environmental Certificates

capability&service

• Simulation tests of safety certificates proceeded
• Service of certificates application for customers

• Electric Performance Test
• Safety Performance Test
• Mechanical Performance Test
• Environmental Performance Test
• Storing Performance Test

Q1. What are the diferences betwee high C-rate and low C-rate lithium?

polymer (Li-Po) batteries.
In general, the diferences lie in the materials made of the positive & negative terminals, the area density design, the electrolyte ingredient, the septum data and the density of inside pieces.

When a Li-Po battery is made, five main aspects should be considered carefully:

(1). Battery Pack should have suficient strength, so that the polymer battery inside could be efectively protected from mechanical shocks;

(2). The polymer cell should be fixedto the battery pack onits large surface area - no cell movement in the battery packshould be allowed;

(3). No sharp edge components should be inside the packcontaining the polymer battery, and meanwhile, suficient insulation layer between wiring and the cell should be used to maintain multiple safety protection;

(4). Ultrasonic welding is recommended for polymer tab connection to obtain low-resistance, high-reliability and light-weight properties;(5). Polymer packs shouldbe designed carefully so that no shear force is applied, and also, no heat is generated even when leakage ocurs for mishaps. PCM from electrolyte leakage should be isolated as perfectly as posible, and narrow distance between bare circuit patterns should be avoided.

Q3. What gases are generated in the formation process. Are they dangerous?

The generated gases include Co, CO2,H2, CH4 and so on. They are not dangerous because of low volume.

Q4. What should be known with regard to handling of battery cells?

1. Aluminum Laminate Film: Easily damaged by sharp edge parts such as Ni-tabs,pins and needles, compared with metal-can-case Li-Po cells.
2. Cells may be damaged by heat above approximately 80℃. Sealing break maycause electrolyte leakage, possibly leading to short circuit and generation of very highcurrent, especially for our high-power series cells, which causes heating of the cellssequently and may results in electrolyte leakage, smoke emission, ignition and/or explosion that are very dangerous. The polymer tabs may be easily short-circuited if put on conductive materials. An appropriate circuitry with PCM shall be employed toprotect accidental short of the battery packs.
3. Mechanical Shock: Polymer has less mechanical endurance than metal can case of Lithium-ion cels.Falling, hiting and bending may cause degradation of polymercharacteristics.
4. Handling of Tabs: the Polymer tabs are not so stubborn, especially for aluminum tabs at the positive terminal. DO NOT put much force on the polymer tabs. DO NOTbend tabs many times. Aluminum tabs may be torn off easily by shear force.

Q5. Why do Li-Po batteries bloat/swell?

The Li-Po batteries may bloat or swell due to the following reason:
1. Overcharging:Normally, the maximum charge voltage is 4.2V for RC batteries. If the batteries were overcharged beyond 4.4V, electrolytic oxidation process would happen, which generates mass gas leading to battery swelling.
2. Overheat:When discharging in high temperature or high C rate, the temperature of the inner part of the battery can be even higher, which gasify the electrolyte and results in swelling.
3. Shot-circuit.:If short circuit happened, the cell voltage would drop very fast and the electrolyte would be reactive to generate gases, leading to battery swelling.
4, Sealing:If sealed without proper processing, the battery cell would have water and air in, so that the electrolyte would be reactive to generate gases, leading to battery swelling.