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Automatic Electrolyte Filling Machine – Vacuum System
Our electrolyte filling machine delivers precise, automated electrolyte injection for prismatic, pouch, and cylindrical cells. This automatic liquid injection machine achieves ±0.5% filling accuracy, 20+ PPM throughput, and closed-loop weighing control. As a complete vacuum filling system for lithium battery, it integrates vacuum filling, high/low pressure soaking, residue collection, and MES connectivity – ensuring consistent wetting and superior cell performance.
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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 multiple 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.
Automatic Liquid Injection Machine – Key Technical Features
This automatic liquid injection machine incorporates advanced engineering for reliability and precision:
Closed‑loop weighing control – ±0.01g pre‑ and post‑weighing ensures filling accuracy of ±0.5%.
High throughput – ≥20 PPM (depending on cell size and soaking time).
PLC + HMI touchscreen – Programmable recipes, data logging, and MES interface.
Tapered injection nozzle – Prevents residual electrolyte pooling at the filling port.
Pre‑fill & post‑fill cleaning – Nozzle and cup cleaning systems prevent cross‑contamination.
Residual liquid collection – Drip tray and suction system keep cell surfaces clean.
DMC cleaning of filling port – Prepares cell for sealing pin insertion.
The machine is built with a heavy‑duty rotary table (servo‑controlled, bearing‑supported) to prevent deformation and maintain chamber seal integrity over millions of cycles.
Vacuum Filling System for Lithium Battery – Process & Benefits
As a dedicated vacuum filling system for lithium battery, our system follows a fully automatic workflow:
Conveyor feed – Cells enter the machine.
Barcode scanning – Traceability.
Pre‑weighing – Dry weight recorded.
Vacuum filling – Electrolyte injected under controlled vacuum (≤ -0.095 MPa).
High/low pressure soaking – Accelerates electrolyte absorption (total soaking time ≤180s).
Post‑weighing – Verifies injection amount.
DMC cleaning – Removes residue from filling port.
Sealing pin insertion – Pre‑seals the cell for transfer.
Key benefits:
High throughput – ≥20 PPM with short soaking cycles.
Precision – ±0.5% filling accuracy, ±0.2% pump accuracy, ±0.01g weighing.
Clean operation – Nozzle cleaning, residual liquid collection, taper nozzle design.
Low maintenance – Modular design, quick‑change pump heads, easy cleaning.
Industry 4.0 ready – MES connectivity for full traceability and SPC analysis.
Technical Specifications
Injection method | Normal Charging Status |
Injection Pump | The fluid pump is a custom-designed, six-outlet ceramic pump (patented product). |
Injection Accuracy | The injection volume is ±0.03g per pump; the maximum single-cylinder injection volume is 15g. |
Header Pressure | Minimum adjustment accuracy of 0.1 Mpa to 1 Mpa. |
Dwell time | 0.5S to 99S adjustable accuracy: ±0.2S |
The temperature of the head. | Room temperature to 250°C, adjustable with ±5°C accuracy. |
Heating Rate of the Head | The temperature rises from room temperature to 200°C in less than 15 minutes. |
Packaging effect | The gel exhibits excellent solubility and sealing properties. |
First-time pass rate | 99% (excluding incoming material defects) |
Marriage rate | 95% |
Why Choose This System for Your Battery Line
High precision – Closed‑loop weighing control ensures consistent fill weight.
Fast cycle – 20 PPM with ≤180s soaking time.
Clean & reliable – Nozzle cleaning, residual collection, taper nozzle design.
Flexible – One machine for multiple cell formats with quick changeover.
Global support – CE certified, 1‑year warranty, lifetime service.
Our electrolyte filling machine is trusted by EV gigafactories, ESS manufacturers, and battery pilot lines worldwide.
🔋 ±0.5% filling accuracy – Closed‑loop weighing control
⚡ 20 PPM throughput – Fast cycle with ≤180s soaking
🧼 Clean & reliable – Nozzle cleaning, residual collection, MES ready
📥 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.