18650 battery pack 3.7v

　　Large capacity lithium battery assembly method, lithium battery assembly technology

　　Large-capacity lithium battery assembly method, lithium battery assembly technology. The assembly of large-capacity 18650 battery pack 3.7v is also very particular. It is not easy or difficult, but it is also a technical job. Do you want to know how to assemble large-capacity 18650 battery pack 3.7v? Then you must first learn to understand the battery core. Because large-capacity 18650 battery pack 3.7v are generally assembled from a combination of lithium battery cells.

　　Large capacity lithium battery assembly method

　　For example, I want a 6000mAH, 16V large-capacity battery. If the voltage of a battery cell is 4V and the capacity is 1200mAH, then you need 20 cells. It means that 4 cells are formed into a series unit group to become a 16V lithium battery pack. The capacity of such a battery pack is 1200mAH. Then 5 such unit lithium battery packs are connected in parallel to get a 6000mAH. 16V large-capacity lithium battery pack.

　　Issues to note when assembling large-capacity 18650 battery pack 3.7v

　　1. The voltage difference of the lithium battery cells used should not be too large, preferably within 20mV;

　　2. It is not recommended to use the same type of cells from different lithium battery manufacturers for assembly, because manufacturers will cause inconsistent working efficiency between cells due to differences in production technology and battery material formulas, which can easily damage the battery.

　　3. Even if lithium battery cells from the same manufacturer are used, old and new ones cannot be mixed;

　　4. Even if the batteries are from the same manufacturer, it is recommended to use batteries produced in the same batch.

　　The main steps of lithium battery assembly

　　1. Lithium battery pulping: Use special solvents and binders to mix the powdered positive and negative active materials respectively, and stir them evenly at high speed to form slurry-like positive and negative materials.

　　2. Lithium battery coating: Apply the prepared slurry evenly on the surface of the metal foil, dry it, and make positive and negative electrode sheets respectively.

　　3. Lithium battery assembly: Place the positive electrode sheet - separator - negative electrode sheet - separator in the order from top to bottom, roll it into a battery pole core, and then inject electrolyte, sealing and other processes to complete. The assembly process of batteries into finished batteries.

　　4. Formation: Use special battery charging and discharging equipment to conduct charge and discharge tests on the finished batteries, test each battery, and select qualified finished lithium battery packs before leaving the factory.

　　What is a large-capacity lithium battery pack?

　　Large-capacity lithium battery is a popular name for some lithium battery packs with relatively large capacity. There is no specific agreement on the high voltage and capacity of large-capacity 18650 battery pack 3.7v. According to our statistics, generally lithium battery packs with a capacity of more than 5Ah can be called large-capacity 18650 battery pack 3.7v.

　　Lithium battery assembly technology

　　accurate locating

　　You must have appropriate positioning technology and experience to implement an efficient processing calibration system according to mechanical positioning and image processing needs. In order to maintain accuracy over the long term, it is necessary to achieve control of the camera or positioning stage, as well as precise positioning, including installation design.

　　Laser welding

　　If possible, knowledge and results of various lasers such as CO2, YAG, LED, fiber, etc., such as laser welding of battery thin foils, welding of throttle housings and covers, resin welding instead of metal, etc. can be provided based on personal needs. Recommend the most suitable welding method based on specifications and selection of welding machine.

　　press

　　Requires technology and experience in handling various presses, such as air, hydraulic and servo. We have a wide range of results, from test production level robotic arm presses to machine platforms that produce products with high precision and quality control of speed and torque with servo motors.

　　Dimensions

　　Dimensional measurement using various methods using laser displacement meters, image processing equipment, contact and non-contact sensors, etc. In production machines, correct dimensions cannot be measured with measuring equipment alone. Therefore, accuracy must be maintained across the board, including installation vibration, etc.

　　resistance welding

　　The quality and correctness of the resistance welding associated with the production machine has a great influence on the loading work. In view of this situation, we choose the most suitable welding method based on the specifications and materials recommended for selecting the welder.

　　Image Processing

　　Requires experience in various image processing such as positioning, missing parts and scratches, etc. Respond to advanced image processing by combining the most appropriate camera, lighting and processing equipment to respond to the object's shape, accuracy and alertness. Then there is the response to continuous image processing of long objects using the licensee's camera.

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