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What are the key points of the 18650 lithium battery pack process?


eighteen thousand six hundred and fiftyLithium ion batteryIt is one of the most common lithium-ion batteries on the market at present. What are the key points about the pack process of 18650 lithium-ion battery? Let's have a look.

18650 lithium batteryThe pack process is mainly formulated according to the pack battery structure, most of which are 18650lithium batteryThe characteristics of pack technology are similar, which is characterized by multiple parallel and multiple strings. eighteen thousand six hundred and fiftyLithium batteryThe pool pack process has distinctive characteristics, among which the biggest feature is the flexible combination. Most continuous orders can be completed by semi automation. You can imagine that the 18650 lithium battery pack process is becoming more and more streamlined. Generally, the 18650 lithium battery pack includes 18650 cells, battery protection plates, connecting nickel sheets, leading out nickel sheets, green paper accessories, insulating paper, wires or plug wires, PVC outer packaging or shell Output (including connector), key switch, power indicator, EVA, highland barley paper, plastic support and other auxiliary materials together form a pack, and most 18650 battery pack types are suitable for this process.


Design process skills of multi parallel and multi 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 giving priority to operation safety, that is, employees are not easy to short circuit or have better preventive measures during operation.

3. Adopt the principle of equipment, that is to say, those completed with the help of auxiliary equipment need not be manual as much as possible, at least semi-automatic.

4. The packaging design should be reasonable, easy to take and put, and do not leave the product out of the customer for half a day.

Quality characteristics of 18650 lithium battery pack process

1. Using lithium batteries with qualified quality requires qualified and stable suppliers to provide single batteries with good performance. The single batteries can be used after passing a series of safety tests and performance tests.

2. The internal resistance of the battery is required to be low and consistent, no matter 14.8V lithium battery pack or othersEnergy storageThe battery pack should ensure low internal resistance, high current discharge capacity, platform, heat dissipation, etc.

3. The battery structure adopts ventilation design, and the distance between two adjacent batteries is not less than 2mm. This structure requires that the battery be fixed with a plastic bracket.

4. Pack battery factory uses slotted nickel sheet in spot welding. The size of nickel sheet meets the requirements of high current discharge. The nickel sheet material ensures low internal resistance, the spot welding machine ensures stable operation, and the welding needle ensures quality. The operator can work after training and passing the examination. After spot welding, check whether the welding spot is firm. In addition, vibration test shall be conducted for each batch of products to verify the anti vibration performance.

5. Different batches of batteries are made into typical finished products and life tests are carried out. When the experience of lithium battery pack design specification is summarized, the actual cycle life of battery finished products is obtained by cycle test.

6. Verify the high and low temperature performance of the battery. The cells of different pack lithium battery manufacturers are made into finished products and tested at different rates of discharge at high and low temperatures to obtain the actual discharge curve.


The above is about the common pack process points of 18650 lithium battery.

       Source: OFweek lithium power grid

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