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Automatic Vacuum Filling Machine – Electrolyte Filler for Li‑ion Cells
This automated rotary machine performs precision vacuum electrolyte filling for pouch cells. Its unique dual-resting process ensures complete electrolyte absorption and eliminates bubbles, significantly improving battery consistency and lifespan for high-volume manufacturing.
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What Is an Electrolyte Filling Machine?
An electrolyte filling machine is a critical piece of equipment in lithium‑ion battery manufacturing. It injects a precise amount of electrolyte into the cell after electrode assembly, enabling ionic transport between cathode and anode. Our machine supports prismatic, cylindrical, and pouch cell formats, with automatic barcode scanning, pre‑weighing, vacuum filling, high/low pressure cycling, post‑weighing, and cleaning cycles – ensuring consistent wetting and optimal cell performance.
Electrolyte Filling Machine Equipment Introduction
This equipment, the Rotary Fixture (One Station, Six Cells), is a pouch cell electrolyte filling machine custom-developed by PPCELL in response to the current market phenomenon of numerous and varied models of medium-sized polymer batteries. It effectively combines the speed advantage of suction-cup type filling machines with the broad compatibility characteristic of needle-sleeve type filling.
This machine is primarily used to achieve the following functions for medium-sized prismatic pouch lithium-ion batteries: manual loading, automatic conventional electrolyte filling, automatic vacuum resting, automatic vacuum standing, and automatic sealing.
Automatic Liquid Injection Equipment – Key Technical Features
This automatic liquid injection equipment incorporates advanced engineering for reliability and precision:
The key differentiator of this Dual-Resting Electrolyte Filling Machine is its patented two-stage resting sequence within the Rotary Filling System. After the initial vacuum filling, cells enter the first resting station where pressure is stabilized, allowing the electrolyte to begin permeating the electrode stack. They then proceed to a second, longer resting stage for complete and even absorption. This Dual-Station Resting process is crucial for preventing the formation of air bubbles and dry spots—common failure points in pouch cells—directly enhancing cycle life and safety. The Rotary Table design ensures a continuous flow, where each cell undergoes an identical, precisely timed sequence, guaranteeing batch-to-batch uniformity that static systems cannot match.
Beyond its precision, the machine is built for speed and reliability. The automated carousel handles cells with gentle precision, integrating seamlessly with upstream sealing and downstream formation processes. For manufacturers seeking to maximize throughput without compromising on the critical quality of electrolyte infusion, this Pouch Cell Filling Machine with Dual Resting represents the definitive solution, transforming a delicate process into a robust, repeatable pillar of production.
Overall equipment structure
1.Feeding Chamber Station
2.Manual Loading Station
3.Electrolyte Filling Station
4.Vacuum Resting Station
5.Vacuum Resting Station
6.Vacuum Resting Station
7.Unloading Chamber Station
Process flow:
This system executes the following filling sequence: Manual Loading → Automatic Filling → Automatic Resting Stage 1 → Automatic Resting Stage 2 → Automatic Vacuum Sealing → Manual Unloading.
Product Parameters
| No | Category | Parameter Description |
| 1 | Filling Method | Atmospheric Pressure Filling (Standard Condition) |
| 2 | Filling Pump | Six-Outlet Ceramic Pump (Our proprietary patented product) |
| 3 | Filling Accuracy | ±0.03g per pump; Maximum filling amount per cycle is 15g |
| 4 | Sealing Head Pressure | 0.1MPa – 1MPa, minimum adjustment increment: 0.1MPa |
| 5 | Resting Time | 0.5S – 99S adjustable; Accuracy: ±0.2S |
| 6 | Sealing Head Temperature | Ambient temperature – 250℃ adjustable; Accuracy: ±5℃ |
| 7 | Sealing Head Heating Rate | Heating from ambient temperature to 200℃ in less than 15 minutes |
| 8 | Sealing Quality | Excellent gel-sol effect and sealing integrity |
| 9 | First-Pass Yield | 99% (excluding failures caused by incoming material defects) |
| 10 | Operational Availability | 95% (Operational Availability) |
| 11 | Equipment Efficiency | Approximately 16-30 PPM (dependent on battery size due to varying filling times) |
Why Choose This System for Battery Electrolyte Filling
High precision – Closed‑loop weighing control ensures consistent fill weight.
Fast cycle – 20PPM with short soaking time.
Clean operation – Nozzle cleaning, residual liquid collection, taper nozzle design.
Flexible – One machine for multiple cell formats with quick changeover.
Industry 4.0 ready – MES interface, remote monitoring, data logging.
Our electrolyte filling machine is trusted by EV gigafactories, ESS manufacturers, and battery pilot lines worldwide.
📥 Download the Detailed Technical Brochure to explore full specifications and integration guides.
📞 Contact Our Engineering Team for a provide confidential consulting and customized performance analysis for your specific yield goals.