The 18650 lithium-ion battery is one of the most common lithium-ion batteries on the market. So, what are the key points of the 18650 lithium-ion battery pack manufacturing process? Let's take a look.
The 18650 lithium battery pack manufacturing process is mainly based on the battery pack structure. Most 18650 lithium battery pack manufacturing processes are similar, characterized by multiple parallel and series connections. The 18650 lithium battery pack manufacturing process has distinct characteristics, the most significant being its flexible assembly. Most continuous orders can be completed semi-automatically, demonstrating the increasing simplification of the 18650 lithium battery pack process. A typical 18650 lithium battery pack includes: 18650 cells, battery protection board, connecting nickel plates, lead-out nickel plates, kraft paper, insulating paper, wires or plug wires, PVC outer packaging or shell, output (including connectors), key switch, power indicator, and auxiliary materials such as EVA, kraft paper, and plastic brackets. This process is suitable for most types of 18650 battery packs.
I. Parallel and Series Design Process Techniques:
1. Prioritize ease of operation, ensuring ease of use for employees.
2. Prioritize operational safety, ensuring minimal risk of short circuits or adequate preventative measures during employee operation.
3. Adopt an equipment-based approach, meaning that tasks completed with the aid of auxiliary equipment should be automated to minimize manual labor, or at least semi-automated.
4. Packaging design should be reasonable, easy to handle and place, avoiding situations where products cannot be retrieved from the customer's premises after a considerable delay.
II. Process Quality Characteristics:
1. Use high-quality lithium batteries. Qualified and stable suppliers must provide high-performance individual cells. Individual cells must undergo a series of safety and performance tests before use.
2. Low and consistent internal resistance is required. Whether it's a 14.8V lithium battery pack or other energy storage battery packs, low internal resistance must ensure sufficient capacity, plateau, and heat dissipation for high-current discharge.
3. The battery structure employs a ventilation design, maintaining a minimum 2mm gap between adjacent batteries. This structure requires the use of plastic brackets to secure the batteries.
4. PACK battery manufacturers use slotted nickel sheets for spot welding. The nickel sheet dimensions meet the requirements of high-current discharge, the nickel sheet material ensures low internal resistance, the spot welding machine ensures stable operation, and the welding needles ensure quality. Operators are trained and qualified before operating the equipment. After spot welding, the weld joints are inspected for strength. Vibration tests are also conducted on each batch of products to verify vibration resistance.
5. Different batches of batteries are made into typical finished products and life tests are performed. When summarizing experience from lithium battery PACK design specifications, the finished battery products undergo cycle testing to obtain the actual cycle life.
ACEY-BA10060-6 battery life cycle tester is designed for a comprehensive range of battery pack aging tests, suitable for various types including ternary, lithium iron phosphate, lead-acid, nickel-metal hydride, and nickel-cadmium. The equipment is ideal for battery manufacturing enterprises to test battery modules during production, as well as for high current charging and discharging detection in EV/HEV power battery systems. It is also used for high-current charging and discharging tests, battery performance assessments, and daily maintenance of battery modules in battery factories and charging stations.
6. Verify the high and low temperature performance of the batteries. Cells from different PACK lithium battery manufacturers are made into finished products and discharged at different rates at high and low temperatures to obtain actual discharge curves.
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Acey Intelligent delivers integrated one-stop solutions for both semi- and fully-automatic lithium battery pack assembly lines, catering to applications such as ESS, UAVs, e-bikes, e-scooters, power tools, and two/three-wheelers. The company's comprehensive portfolio also includes a full spectrum of battery pack assembly equipment, ranging from cell grading and sorting machines to insulation paper sticking machine, CCD testers, spot welders, BMS testers, and complete battery pack test systems.
