BMS RC Lithium Battery 15c 4s 6s 22.2V 16000mAh For RC Quadcopter

Product Description  

RC Lipo Battery Pack Pouch 15c 4s 6s 22.2V 16000mAh Batteries For RC Quadcopter

Production steps:

Cell Selection

Quality and Capacity: High - quality lithium - polymer cells are carefully selected based on the requirements of the RC application. Cells with the appropriate capacity (usually measured in milliampere - hours, mAh) are chosen to meet the power and runtime needs of the RC device. For example, for a high - performance RC drone that requires longer flight times, cells with a higher capacity, such as 3000 - 5000 mAh, might be selected.

Discharge Rate: The cells' discharge rate, often indicated as a "C - rating," is also a crucial factor. RC applications that demand high - power output, like racing RC cars, need cells with a high C - rating. For instance, a cell with a 50C - 100C discharge rate can provide a large amount of current quickly during acceleration or other high - energy maneuvers.

Cell Matching

Voltage and Capacity Matching: To ensure consistent performance, cells are matched based on their voltage and capacity. Cells with very similar open - circuit voltages and capacities are grouped together. This is important because in a battery pack, if there are significant differences between cells, some cells may overcharge or overdischarge during use, leading to reduced battery life and potential safety hazards. Advanced testing equipment is used to measure and sort cells accurately.

Pre - assembly Preparation

Cell Cleaning: The selected cells are carefully cleaned to remove any dust, debris, or manufacturing residues. This is to ensure good electrical contact and prevent any short - circuits that could occur due to foreign particles.

Tab Preparation: The battery tabs (the metal connectors on the cells) are prepared. This may involve cutting, shaping, or adding additional conductive materials to the tabs to ensure a reliable connection between cells during the assembly process.

Assembly

Series and Parallel Connection: The cells are connected in either series or parallel configurations, depending on the desired voltage and capacity of the battery pack. In a series connection, the voltages of the cells add up. For example, if three 3.7V cells are connected in series, the resulting battery pack will have a voltage of 3.7V x 3 = 11.1V. In a parallel connection, the capacities add up while the voltage remains the same as that of a single cell.

Soldering: High - quality soldering techniques are used to connect the cells. A suitable solder alloy, usually with good conductivity and low melting point, is applied to the tabs to create a secure electrical connection. It's crucial to ensure that the soldered joints are clean, smooth, and free of any cold - joints or other defects that could lead to high - resistance connections and overheating.

Protection Circuit Installation

Battery Management System (BMS): A BMS is installed to protect the battery pack from overcharging, overdischarging, over - current, and short - circuits. The BMS monitors the voltage and current of each cell and takes appropriate actions. For example, if a cell's voltage reaches the overcharge limit during charging, the BMS will cut off the charging current. It also balances the charge between cells to ensure even charging and discharging, which is vital for the long - term health of the battery pack.

Packaging and Encapsulation

Insulating Materials: The assembled battery pack is wrapped with insulating materials such as heat - shrink tubing or insulating tapes. This provides electrical insulation and protects the cells and connections from external factors such as moisture and physical damage.

Case or Enclosure: Some battery packs are placed in a custom - made case or enclosure. The case can be made of plastic or other materials and is designed to provide additional physical protection and may also have features like mounting points for easy installation in the RC device.

Testing and Quality Assurance

Electrical Testing: The battery pack undergoes a series of electrical tests. This includes measuring the open - circuit voltage, internal resistance, and capacity. The pack is also tested under different load conditions to ensure that it can deliver the expected power output and that the voltage remains stable during discharge.

Safety Testing: Safety - related tests such as overcharge, overdischarge, and short - circuit tests are performed to ensure that the protection circuits are working correctly. The battery pack is also checked for any signs of swelling, leakage, or other abnormal behavior during these tests.

Performance Verification: The battery pack's performance is verified against the specific requirements of the RC application. This may involve testing its ability to provide power for rapid acceleration, long - term operation, or other functions typical of the RC device it's intended for.

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