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18650 Lithium Battery Pack Process Points

Source:JYH Technology News Date:2019-09-19
The 18650 lithium-ion battery is one of the most common lithium-ion batteries on the market. What are the main points of the PACK process for the 18650 lithium-ion battery? Let's take a look at it together.
The 18650 lithium battery pack process is mainly based on the PACK battery structure, and most of the 18650 lithium battery pack process features are similar. It is characterized by multiple parallel and multiple series. The 18650 lithium battery PACK process features distinct features. The biggest feature is the flexibility of combination. Most of the continuous orders can be semi-automatically completed. It is conceivable that the 18650 lithium battery pack process is now more and more streamlined. The general 18650 lithium battery PACK battery pack includes: 18650 cells, battery protection board, connecting nickel sheets, lead nickel sheets, green paper accessories, insulating paper, wires or plug wires, PVC outer packaging or casing, output (including connectors), key switch, power indicator, EVA, barley paper and plastic brackets etc. auxiliary materials constitute PACK. And most of the 18650 battery PACK types are applicable to this process.
Multi-parallel multi-series 18650 lithium battery pack design process skills:

(1) Take the principle of priority and easy operation

(2) Take priority in the principle of operational safety

(3) It is done without auxiliary equipment, at least semi-automatically.

(4) The packaging design should be reasonable, easy to take and put. 
18650 lithium battery pack process quality characteristics:
(1) Lithium batteries with quality pass-through require a stable and stable supplier to provide a single-cell battery with good performance. After passing through a series of safety tests and performance tests, the single-cell battery is used after passing the test.
(2) Requires low battery internal resistance and good consistency, regardless of the 14.8V lithium battery pack or other energy storage battery pack. Ensure low internal resistance and capacity, platform, heat dissipation of large current discharge.
(3) The structure of the battery is ventilated, and the distance between the two adjacent batteries is not less than 2mm. This structure requires the plastic bracket to fix the battery.
(4) PACK battery factory uses slotted nickel plate for spot welding. The size of nickel plate meets the requirements of large current discharge. The nickel plate material guarantees low internal resistance. The spot welder guarantees stable operation and the quality of the welding pin ensures quality. The operator is trained and qualified and then put into operation. The operator will check if the solder joint is secure after spot. welding. In addition, vibration tests were performed on each batch of products to verify vibration resistance.
(5) Different batches of batteries were made into typical finished products and tested for their lifetime. Combined with the PACK design specification for lithium batteries.
(6) Verify the high and low temperature performance of the battery. Different PACK lithium battery manufacturers' cells are made into finished products. The discharge test of different magnifications will be performed at high and low temperatures, and then the actual discharge curve will be obtained. 
The above is the main point of the PACK process common to 18650 lithium batteries.

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