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What are the key points of 18650 lithium pack process?

June 19, 2020

18650 Lithium ion batteries are one of the most common lithium ion batteries in the market. The process pack 18650 lithium battery is mainly based on the PACK battery structure, most of the 18650 lithium battery pack process characteristics are much the same, its characteristics are many and many strings. The process PACK 18650 lithium batteries is now becoming more and more streamlined. Generally, the battery pack PACK 18650 lithium batteries includes :18650 cores, battery protection panels, connecting nickel sheets, leading out nickel sheets, green paper accessories, insulating paper, wires or plug wires, PVC outer packaging or housing, output (including connectors), key switches, power indicators, EVA、 highland barley paper, plastic support and other auxiliary materials together PACK, and most of the 18650 battery PACK types are suitable for this process.

Design Technique of Multiple Series 18650 Lithium Battery pack

1. adopt the principle of priority and easy operation, that is, employees are easy to operate.

2. adopt the principle of priority operation safety, that is, the staff operation is not easy to short circuit or have better preventive measures.

3. adopt the principle of equipment, that is, with the aid of auxiliary equipment to complete as far as possible without manual, at least semi-automatic.

4. packaging design should be reasonable, easy to take easy to put, do not product out to the customer there half a day can not take out.

Pack process quality characteristics of 18650 lithium batteries

1. the use of quality clearance lithium battery, need qualified and stable suppliers to provide good performance of the single battery, the single battery after a series of safety tests and performance tests, qualified after the use.

2. requires low internal resistance and good consistency, whether 14.8 V lithium battery pack or other energy storage battery pack, to ensure low internal resistance to ensure high current discharge capacity, platform, heat dissipation, etc.

3. ventilation design is used in the structure of the battery, and the spacing between two adjacent batteries is not less than 2 mm. This structure requires the fixing of the battery with a plastic bracket.

4.PACK the battery factory uses slotted nickel sheet in spot welding, the size of nickel sheet meets the requirement of high current discharge, the material of nickel sheet ensures low internal resistance, the spot welding machine ensures stable work, the welding needle guarantees quality, the operator is trained and qualified to take up the post operation, and the spot welding after spot welding detects whether the solder joint is firm or not. another batch of products do vibration experiments to verify the vibration resistance.

5. different batches of batteries made into typical finished products and do life test, lithium battery PACK design specification experience summary when the battery finished product cycle test to get the actual cycle life.

6. verify the high and low temperature performance of the battery. Different PACK lithium battery factory’s electric core makes the finished product and does the different rate discharge test under the high and low temperature, obtains the actual discharge curve.

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