What is the process of assembly of a prismatic cell?

Prismatic Cell Assembly Line Process

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Introduction

A prismatic cell assembly line is an automated process that involves several steps for producing high-quality prismatic batteries. The process flow includes automatic feeding, OCV testing, sorting, cleaning, gluing, stacking, polarity judgment, automatic tightening, manual bundling, and post-welding inspection. In this document, we will provide a detailed explanation of each step of the process and its importance.

1.Automatic Feeding

The first step of the process is the automatic feeding of cells onto the assembly line. This is done to ensure that the cells are placed in the right position for the subsequent steps.

2.OCV Testing and Sorting

The next step involves testing the cells' open-circuit voltage (OCV) and sorting them based on their performance. This step is crucial to ensure that only cells with the required performance characteristics are used in the final product.

3.Cleaning

The cells are then cleaned using either a plasma or laser cleaning process. This is done to remove any contaminants that may affect the battery's performance.

4.Gluing and Stacking

After cleaning, the cells are glued together and stacked to form a battery pack. The gluing process ensures that the cells are held securely in place, and the stacking process is done according to the battery pack's design specifications.

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5.Polarity Judgment and Automatic Tightening

Once the cells are stacked, polarity judgment is performed to ensure that the cells are connected correctly. The cells are then automatically tightened to ensure that they are securely connected.

6.Manual Bundling

After the cells are tightened, manual bundling is done to provide additional support to the battery pack. This step is done manually to ensure that the bundling is done correctly.

7.Post-Welding Inspection

After bundling, the battery pack is sent for post-welding inspection. This is done to ensure that the welding process has been done correctly, and there are no defects in the battery pack.

Conclusion

The prismatic cell assembly line is a complex process that requires precision and accuracy at every step. By following this process flow, we can produce high-quality prismatic batteries with high production efficiency and product yield.

1. Automated Loading: The process begins with automated loading of prismatic cell components onto the assembly line, including the aluminum shell, cathode and anode, separator, and electrolyte.
2. OCV Testing and Sorting: The prismatic cells are tested for open circuit voltage (OCV) and sorted based on their voltage levels.
3. NG Removal: Non-conforming prismatic cells are removed from the assembly line and processed separately to maintain product quality.
4. Plasma or Laser Cleaning: The prismatic cells are cleaned using plasma or laser technology to ensure that the surfaces are free from contaminants and provide a clean surface for gluing.
5. Gluing: The prismatic cells are then glued together to form a cell stack using a precise amount of adhesive to ensure that the cell stack remains secure during the welding process.
6. Stacking: The prismatic cell stack is then assembled using a specialized stacking process that ensures consistent and accurate alignment.
7. Polarity Determination: The polarities of the prismatic cells are determined to ensure that the correct orientation is maintained during assembly.
8. Automatic Clamping: The prismatic cell stack is then clamped together using an automated process to ensure that the stack remains secure during the welding process.
9. Manual Strapping: After clamping, the prismatic cell stack is manually strapped to further secure the cell stack.
10. Automatic Loosening: Once the prismatic cell stack has been welded, the automated clamping system releases the stack to enable post-welding processing.
11. Pole Cleaning: The prismatic cell stack's poles are then cleaned to ensure that there is no residual debris left after welding.
12. Manual Aluminum Busbar Installation: The aluminum busbars are manually installed onto the prismatic cell stack after cleaning.
13. Laser Welding: The aluminum busbars are welded to the prismatic cell stack using laser welding technology, ensuring a high-quality, durable weld.
14. Post-welding Testing: The welded prismatic cell stack is then tested to ensure that the welds are of high quality and meet product specifications.
15. EOL Testing: The prismatic cell stack undergoes end-of-line testing to ensure that the completed product meets all requirements and specifications.
16. DCIR Testing: The prismatic cell stack also undergoes DCIR testing to ensure that the internal resistance of the prismatic cell is within the specified range.
17. Final Pack Assembly: The prismatic cell stack is then transferred to the final pack assembly line for additional processing, including integration into a battery pack, testing, and final inspection.

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