Is it better to choose the lamination process or the winding process for customizing lithium-ion battery cells?

If you have some special requirements for the battery, you can customize lithium-ion battery cells. Through this, you can decide the special features of the battery cells according to the environment. Now you will have to decide whether you want to go for the lamination process or the winding process for customizing lithium-ion battery cells. 

Both processes have pros and cons; therefore, you have to be careful before choosing any of them. 

Laminated Process for Lithium-ion Battery Cells

If you are considering a laminated process for customizing lithium-ion battery cells according to your requirements, then this negative and positive electrode gets cut into small pieces. These small pieces are further separated and laminated to form a small cell. A large cell consists of a stack of small cells. 

Winding Process for Lithium-ion Battery Cells

The winding process for customizing lithium-ion battery cells requires more perfection, attention, and carefulness. The basic principle of this process is to use an anode to cover the cathode, and then the battery separator will separate the cathode from the anode foil. Pay attention to the foil alignment if you want to use the winding process so the battery cells will work properly later.

Laminated Cell Production Process

You might still be confused about the laminated cell production process for customized lithium-ion battery cells. Well, here are a few details that will certainly help you to understand the process in a better way:

Minimized Charge and Discharge Speed With Lamination

You might have some idea about the whole laminated cell production process that cells might get laminated in. First, you must know that if you consider this process, you can minimize your lithium-ion battery cells' fast charge and discharge abilities. If you use a lamination strategy during cell assembly, then it will improve the density and capacity of your lithium-ion battery.

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Electrode Sheets and Separator Gets Laminated

Electrode sheets and the separator gets laminated during the cell assembly process. The lamination keeps the cells as a single stack, improving electrochemical performance. This method would be more convenient to assemble the cells in one place. Cells get more resistant and work perfectly in your lithium-ion battery this way. 

Winding Cell Production Process

It would be wise to know all your options whenever you think about customizing lithium-ion cells. Here are a few details that will help you to know the winding cell production process in a better way:

Anode Covering Cathode

Winding cell production is quite a basic process that most manufacturers use to design a lithium-ion battery. If you are considering this option, you must know that you must be careful while carrying out the winding cell process.

The basic principle of this whole process depends on covering the cathode with the anode, which is separated by the battery separator. Yes, the cathode and anode foil get separated, and you must do it with full attention when it comes to winding cells.

The foil alignment and winding tension must be accurate for the winded cells to perform later. Otherwise, if the winding tension is small, it will surely affect the shell entry rate and internal resistance. If these two factors get affected, it might cause a short circuit or an electrode fracture. 

Anode and Cathode Alignment

The anode width has to be 59.9mm, and the cathode width has to be 58mm with a battery separate of 61mm. These three main components get aligned in the center so you can avoid any short circuit situation to take place. The winding tensions must be accurate according to the process, requirements, and equipment.

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Battery Electrochemical Performance Comparison

You might still be confused about whether the laminated cell production process is better or the winding cell production process. Here is a little comparison that will make things a little clearer for you to decide:

Laminated cells have a lower internal resistance.

If you want the cells of your lithium-ion battery to have high internal resistance against the external pressures, then laminated cells are not the ideal considerable option. Winding cells come with high internal resistance. So they would work more efficiently for a long time. 

Lower Heat Density With Winding Cells 

If we talk about high temperatures, the winding cell process is the ideal option because it has lower heat density than laminated cells in lithium-ion batteries. It is not easy to do thermal isolation between winded cells inside the lithium-ion battery. As a result, out of control, heat dissipation can take place, and this doesn't sound ideal at all.

Suppose you want to consider the process that will help the cells and the lithium-ion battery to work efficiently even in high temperatures. In that case, the laminated cells process is a better option because it is safer. 

Laminated cells have flexible sizes.

You get to decide the size of each cell according to your customized lithium-ion battery requirements. Laminated cells have flexible sizes and have higher internal space, but this won't be the case if you consider the winding cell process. They don't offer flexibility, and in the end, you will find them a little thicker, and they will require a lot of space to get settled inside the lithium-ion battery.

Winding cells are easy to weld.

Welding winding cells are easy because when it comes to laminated cells, you will have to well all of them at one welding spot, which is difficult to operate. Conversely, welding winding cells is easy through the electric welding technique. The lithium-ion battery will require two places to get welded inside it, and this sound much easier and more convenient than welding laminated cells. 

Final Words

Both the laminated cell and winding cell process work best for customizing lithium-ion cells, but if you want the best option, choose the laminated cell process. As you will have more internal space in the battery unit, it will get fully utilized, and the battery will work to its maximum capacity.