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Prismatic Battery Automatic Vacuum Filling Machine – High-Precision Electrolyte Injection for EV & ESS Cells
Our prismatic battery automatic vacuum filling machine is designed for high‑volume electrolyte injection into square aluminum‑case cells. This square aluminum cell electrolyte injection equipment automates conveyor feeding, barcode scanning, Hi‑pot testing, pre‑weighing, vacuum filling, high/low pressure soaking, post‑weighing, DMC cleaning, rubber pin insertion, and inspection. As an EV battery liquid injection and soaking system, it achieves ≥12PPM, 99.5% yield, ±0.8% filling accuracy, and ±0.01g weighing precision – with zero pressure differential filling to prevent cell deformation.
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⚡ Key Performance: ±0.8% filling accuracy | ≥12 PPM | 99.5% yield | 98% OEE | Zero pressure differential filling | ±0.01g weighing precision
Product Overview – Prismatic Battery Electrolyte Filling Machine
PPCELL’s prismatic battery automatic vacuum filling machine is a high-precision electrolyte injection system designed for high-volume production of square aluminum‑case batteries. This square aluminum cell electrolyte injection equipment automates conveyor feeding, barcode scanning, Hi‑pot testing, pre‑weighing, vacuum filling, high/low pressure soaking, post‑weighing, DMC cleaning, and rubber pin insertion. As an EV battery liquid injection and soaking system, it achieves ≥12 PPM throughput, 99.5% yield, ±0.8% filling accuracy, and ±0.01g weighing precision – with zero pressure differential filling to prevent cell deformation. Ideal for electric vehicle and energy storage system battery production lines.
Key Features – Automatic Liquid Injection Equipment
- Zero Pressure Differential Filling: Cell internal and external pressure equalized during filling, preventing case deformation, reducing soaking time, and improving efficiency. Internal/external positive nitrogen pressure ≤0.6MPa.
- Pre-Fill Cleaning System: Filling cup and nozzle cleaning before each cycle improves filling accuracy and prevents secondary contamination.
- Residual Liquid Collection: Nozzle drip collection after filling avoids electrolyte contamination on cell surfaces.
- Tapered Insert Nozzle: Eliminates liquid residue at the filling port step/right‑angle junction.
- Modular Design: Capacity unaffected by soaking time; additional filling units can be added to maintain throughput when process time increases.
- High-Precision Dosing: Electronic ceramic variable pump delivers ±0.2% pump accuracy and ±0.8% overall filling accuracy.
- MES Integration: Full traceability with barcode scanning and data upload for quality tracking and process optimization.
Technical Specifications – Prismatic Cell Filling Equipment
| Parameter | Specification |
|---|---|
| Dimensions (L×W×H) | 14590 × 3000 × 2753 mm |
| Weight | ≈10.5 T |
| Power | 15 kW |
| Power Supply | AC380V / 50Hz |
| Air Source | ≥0.7MPa, 30L/s (50% utilization) |
| Vacuum Source | ≤ -95kPa, 60L/s |
| Nitrogen | ≥0.6MPa, 60L/s |
| Cell Size Range (L×W×T) | 80–220 × 60–180 × 15–60 mm |
| Production Capacity | ≥12 PPM (total soaking & pressure time ≤25 min) |
| Yield | ≥99.5% |
| OEE (Availability) | ≥98% |
| Filling Volume Range | 0–800g (customizable) |
| Filling Pump Accuracy | ±0.2% |
| Filling Accuracy | ±0.8% |
| Weighing Accuracy | ±0.01g |
Complete Process Flow
The fully automatic process sequence includes:
- Conveyor feeding – Cells enter the system.
- Barcode scanning – Full traceability.
- Short circuit (Hi‑pot) test – Rejects defective cells early.
- Pre‑weighing – Dry weight recorded.
- Reject collection – Bad cells removed.
- Automatic loading into filling fixture – Cells positioned.
- Leak test before filling – Ensures cell integrity.
- Automatic vacuum filling – Electrolyte injected under controlled vacuum.
- High/low pressure cyclic soaking – Accelerates electrolyte absorption.
- Residual liquid collection – Prevents drips.
- Filling cup & nozzle cleaning – Prepares for next cycle.
- Unloading from fixture – Cells released.
- Post‑weighing – Verifies electrolyte amount.
- Automatic DMC cleaning of filling port – Removes residue.
- Rubber pin insertion – Seals the port.
- Pin inspection – Confirms correct insertion.
- Conveyor outfeed – Transfers cells to next process.
FAQ
Q1: What is zero pressure differential filling and why is it important?
Zero pressure differential filling equalizes internal and external cell pressure during filling, preventing case deformation, reducing soaking time, and improving efficiency. This is critical for prismatic aluminum‑shell cells where case deformation can compromise cell performance and safety.
Q2: What is the typical production throughput for this machine?
The machine achieves ≥12 PPM (cells per minute) with total soaking and pressure time ≤25 minutes. Throughput can be customized based on specific cell sizes and electrolyte filling volumes.
Q3: What is the difference between first filling and second filling?
Our equipment is compatible with both first filling and second filling processes. First filling occurs after cell assembly to introduce the initial electrolyte, while second filling (or refilling) compensates for electrolyte consumed during formation, ensuring optimal cell performance.
Q4: Can this machine be integrated with my MES system?
Yes. The system supports full MES integration with barcode scanning, pre‑fill and post‑fill weighing data upload, and real‑time production monitoring for complete traceability and quality control.
Q5: How does the residual liquid collection system work?
After each filling cycle, the nozzle drip collection system captures residual electrolyte to prevent contamination on cell surfaces. This ensures clean cell exteriors and reduces waste.
Q6: What is the filling accuracy of this machine?
The electronic ceramic variable pump delivers ±0.2% pump accuracy with ±0.8% overall filling accuracy, supported by ±0.01g pre‑fill and post‑fill weighing precision for closed‑loop quality control.
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