Prismatic Cell Casing Materials

Prismatic Cell Casing Materials for Battery Research and Manufacturing — TOB-2714895

Product Overview and Ideal Applications

The prismatic cell casing is the rigid aluminum housing that encloses the electrode stack and electrolyte of a prismatic lithium-ion cell, providing mechanical protection, hermetic sealing, and the structural integrity required for cell operation. TOB New Energy supplies a comprehensive range of prismatic cell casing materials in multiple sizes to support battery research and manufacturing.

The TOB-2714895 prismatic cell casing—with a thickness of 27 mm, a length of 148 mm, and a height of 95 mm—is one of the most widely used casing formats in this size family, serving mid-capacity prismatic cells for energy storage, power, and consumer applications. The casing is manufactured to precise dimensional tolerances, ensuring that the electrode stack fits correctly and that the cell can be hermetically sealed with the top lid and filling port.

TOB provides a total of 20 casing sizes covering a wide range of prismatic cell formats, from compact cells (2614891: 26.5 × 148 × 91 mm) to large-format cells (21574118: 21.5 × 574 × 118 mm). This size diversity allows researchers and manufacturers to select the casing that matches their cell capacity, energy density, and application requirements without custom tooling.

Ideal for:

• Battery R&D laboratories assembling prismatic cells for material evaluation, cell design optimization, and prototype testing.
• Pilot-scale production of prismatic lithium-ion cells, where a standard casing size reduces lead time and tooling cost.
• Cell manufacturers evaluating different prismatic cell form factors before committing to a large-volume production format.
• Research on cell packaging, welding, and sealing processes using a standardized casing with known dimensions.

Need to confirm that the TOB-2714895 casing dimensions match your electrode stack design, or require a different size from the list? Contact our battery materials engineers with your cell design.

Where Prismatic Cell Casings Fit in Battery Cell Assembly

In the manufacturing of a prismatic lithium-ion cell, the casing is the structural container that holds all the internal components. The cell assembly sequence using the TOB-2714895 casing is:

Electrode stack preparation: The cathode, separator, and anode sheets are stacked or wound to form the electrode assembly.

• Casing preparation: The prismatic cell casing is cleaned and prepared for assembly. The casing provides the cavity that will hold the electrode stack.
• Electrode insertion: The electrode stack is inserted into the casing.
• Tab welding: The cathode and anode tabs are welded to the terminal posts or current collectors of the casing (typically by ultrasonic welding for tabs and laser welding for the top lid).
• Top lid sealing: The top lid, which carries the terminals and the electrolyte filling port, is laser-welded onto the casing opening to create a hermetic seal.
• Electrolyte filling and final sealing: Electrolyte is introduced through the filling port, and the port is then sealed to complete the hermetic enclosure.

The dimensional accuracy and material quality of the casing are critical throughout this process. The casing must provide a precise cavity for the electrode stack, a weldable surface for the top lid, and corrosion resistance to the electrolyte and internal environment. The TOB-2714895 casing is designed to meet these requirements for its size class.

Prismatic Cell Casing Size List

The following table lists the complete range of prismatic cell casing sizes supplied by TOB.

Note: The table includes the full size list as provided. The TOB-2714895 model featured on this page is highlighted as the standard offering; all other sizes are available from the same manufacturing line.

2714895 Prismatic Cell Case

Key Characteristics of the TOB-2714895 Prismatic Cell Casing

1. Standard 2714895 Form Factor (27 × 148 × 95 mm)
   The TOB-2714895 casing measures 27 mm in thickness, 148 mm in length, and 95 mm in height—a widely used mid-size prismatic format suitable for a range of energy storage and power battery applications. This form factor provides a practical balance between cell capacity and packaging efficiency.
2. Comprehensive Size Range for Design Flexibility
   TOB supplies 20 casing sizes spanning from compact cells to large-format energy storage cells. This range allows researchers and manufacturers to evaluate multiple cell form factors using standardized casings before committing to a production format, reducing development time and cost.
3. Consistent Dimensional Control
   Each casing is manufactured to precise dimensional specifications, ensuring a consistent cavity for the electrode stack and reliable fit with the top lid and filling port. Dimensional consistency is essential for repeatable cell assembly, tab positioning, and laser-welding alignment.
4. Compatible with Standard Prismatic Cell Assembly Processes
   The casing is compatible with the standard prismatic cell assembly sequence—electrode insertion, tab welding, top lid laser welding, electrolyte filling, and final sealing. This allows the TOB-2714895 to be integrated directly into existing prismatic cell production lines or laboratory assembly workflows.
5. Suitable for Battery Research and Manufacturing
   As stated in the product description, TOB provides prismatic cell casing materials for both battery research and manufacturing. The casing supports applications from coin-cell-scale prototype development (in prismatic format) to pilot-scale and production-scale cell assembly.

Casing Selection Guidance

When selecting a prismatic cell casing from the TOB size list, the following factors should be considered:

• Cell capacity and energy density: Larger casings (thicker, longer, or taller) accommodate larger electrode stacks and provide higher cell capacity. Select the casing size that matches your target capacity and energy density.
• Electrode stack dimensions: The casing cavity must accommodate the electrode stack with the appropriate clearance for the separator, tabs, and any internal insulating components. The tab positions on the electrode stack must align with the terminal posts of the casing.
• Application requirements: Power cells for high-rate applications may benefit from a compact casing with a shorter ion path, while energy cells may use a larger casing to maximize active material loading. Consider the thermal and mechanical requirements of the target application.
• Welding and sealing compatibility: The casing must be compatible with the laser-welding process used to seal the top lid. The flange geometry and material thickness must be suitable for the welding parameters.
• Manufacturing scale: For research and pilot production, the standard casing sizes provide flexibility without custom tooling cost. For large-volume production, a dedicated casing size can be specified.

Engineering FAQ

Q1: Can the TOB-2714895 casing be used for both research and production-scale cell assembly?

Yes. As stated in the product description, TOB provides prismatic cell casing materials for battery research and manufacturing. The TOB-2714895 is manufactured to consistent dimensional specifications, making it suitable for both laboratory-scale cell assembly (for material evaluation and prototype development) and production-scale cell manufacturing.

Q2: Are the other casing sizes in the list available, or only the TOB-2714895?

All sizes listed in the table are available from TOB's prismatic cell casing manufacturing line. The TOB-2714895 is the featured model on this page, but the full range—from 2614891 to 21574118—can be supplied. Contact TOB with your specific size requirement for availability and quotation.

Q3: How do I select the correct casing size for my electrode stack?

Select the casing whose internal cavity can accommodate your electrode stack with appropriate clearance. The stack dimensions (length, width, height) must be smaller than the casing cavity to allow for separator overhang, tab routing, and insulating components. Confirm that the tab positions align with the casing terminal posts. TOB engineers can assist with the selection based on your cell design.

Q4: What materials are the prismatic cell casings made of?

The product name indicates that these are prismatic cell casing materials for battery use. The standard material for prismatic lithium-ion cell casings is aluminum (typically 3003 or 1060 grade aluminum alloy), which provides light weight, good thermal conductivity, and corrosion resistance. The specific material grade for each casing size can be confirmed with TOB at the time of order.

Q5: Can the casing be customized to a different size?

The standard size list covers 20 common prismatic formats. For a casing size not in the list, custom tooling may be required. Contact TOB with your required dimensions and application to discuss the feasibility and lead time for a custom casing.

Ready to build prismatic cells with a reliable, dimensionally consistent aluminum casing? Request a quotation for the TOB-2714895 or any other size from the prismatic cell casing list. Our battery materials engineers can assist with casing selection, welding compatibility, and integration into your cell assembly line.

tob.amy@tobmachine.com | +86 181 2071 5609

You May Also Need

1. 18650 Cylinder Cell Case — Cylindrical cell cases for 18650-format lithium-ion cells. Complements the prismatic casing range by providing cylindrical casing options for battery research and manufacturing.

2. Coin Cell Parts — A full range of coin cell components for coin-cell battery assembly. Complements the TOB prismatic cell casing range by providing the hardware for coin-cell-format research and testing.

3. Laser Welding Machine for Prismatic Cell Top Lid and Filling Port Sealing — A laser welding machine specifically designed for sealing the top lid and filling port of prismatic cells. Complements the TOB-2714895 casing by providing the sealing equipment for completing the prismatic cell assembly process.