TMAXCN Brand 1gwh LFP Prismatic Cell EV Car Battery Production Line

• Certification: ISO, CE
• Transport Package: Wood Packing
• Trademark: TMAX
• Origin: China
• Model NO.: Type: Automatic

Product Description

 

1GWh EV Car Battery LFP 30Ah 50Ah 100Ah Prismatic Cell Aluminium Case Cell Production Line

 

1. Prismatic Cell:

Prismatic cell is often used for high capacity battery applications to optimise the use of space. These designs use a stacked electrode structure in which the anode and cathode foils are cut into individual electrode plates which are stacked alternately and kept apart by the separator. The separator may be cut to the same size as the electrodes but more likely it is applied in a long strip wound in a zig zag fashion between alternate electrodes in the stack.

 

2. Project implementation process:

3.Equipment List:

 

SN.	Equipment Name
1	Mixing Equipment
2	Feeding System
3	Slurry Buffer Tank
4	Auto Double Sides Slot Die Coating Machine
5	NMP Recovery System
6	Calender Machine
7	Auto Slitting Machine
8	Stamping Machine
9	Auto Stacking Machine
10	Ultrasonic Spot Welding Machine   (Tab to lid welding)
11	Cover Plate Welding Machine
12	Insulator Wrapping Machine
13	Shelling &Welding Machine
14	Helium Testing Machine
15	Washing Machine
16	X-ray Tester
17	High Vacuum Oven
18	Auto Electrolyte Filling Machine
19	High Temperature Wetting
20	Negative Pressure Formation Machine
21	Laser Welding&Sealing Machine
22	OCV Tester
23	Charging Machine
24	PVC Film Pasting Machine
25	Drying Unit
26	Air Compressor Unit
27	Vacuum Unit
28	Nitrogen Generating Unit
29	Deionized Water Machine
30	Cooler
31	ACIR Tester

4. The process for prismatic cell is illustrated in the following diagram:

(a.Stacking Process)

(b.Winding Process)

5. Battery Manufacturing Basics from Prismatic Cell Production Line :

 

The 1st stage: electrode manufacturing:

The first stage in battery manufacturing is the fabrication of positive and negative electrodes. The main processes involved are: mixing, coating, calendering, slitting, electrode making (including die cutting and tab welding). The equipment used in this stage are: mixer, coating machine, roller press, slitting machine, electrode making machine.

Mixing - Electrode slurry preparation process:

 

To produce an electrode slurry, the raw active materials are combined with solvent, binder, and additives. Slurry mixing is the first step of the electrode manufacturing process, and the process is done separately for cathode and anode materials. The key measurable characteristics of this process (viscosity, density, solid content) will directly affect the quality of the battery and the uniformity of the electrode. In the mixing process, the formulation of raw materials, mixing steps, mixing time are all important parameters.

 

 

Coating - Coat and dry the electrode slurry on the current collector foil:

 

The quality of the coating and drying processes profoundly affects the uniformity, consistency, safety, and cycle life of the manufactured battery. Non-uniformity or defects introduced at this stage on either side of the electrodes will result in poor electrochemical performance of the battery and can cause serious safety issues.

Calendering - Rolling press the coated electrodes:

 

Calendering is an important process to affect the cell performance by controlling the electrode porosity and tortuosity. Higher calendering pressure applied to electrode reduces thickness of the active layer thus increases the volumetric energy density. While a strong calendaring will also increase the tortuosity of the electrode, affecting the electrode's electrochemical impedance. 

 

The figure below illustrates how electrode's press density changes with calendering line load.

 

Slitting and electrode making - Cut the electrode to the required size and prepare the tab:

 

Slitting (equipment: slitting machine) is to longitudinally cut the coated electrode into narrow slices of the required width. Any burring or buckling introduced at this stage will increase the risks of internal shorts that can cause serious safety issues. After slitting, the key process parameters to measure are electrode width, electrode edge flatness, and the presence and characteristic of burrs.

 

 

 

6. The 2nd stage:Prismatic Cell Assembly Process:

 

 Workshop reference: