Liquid Injection Machine
PRODUCT PARAMETERS
Description
Liquid Injection Machine – Vacuum Electrolyte Filling System for Polymer Batteries
We designed this Liquid Injection Machine specifically for precise electrolyte filling of polymer lithium batteries. Its advanced vacuum injection nozzle uses a pneumatic shut-off valve with a stainless steel poppet and Teflon conical seat, ensuring bubble-free dosing and clean cut-off. Therefore, it delivers consistent, high-accuracy injections for R&D and production environments.
System Configuration
| Component | Description |
|---|---|
| Frame | Stainless steel and oxidized aluminum alloy construction |
| Vacuum Box Head | Aluminum alloy container with pneumatic/manual lifting, vacuum sealed |
| Injection Nozzle | Pneumatic shut-off type, mounted on vacuum box, vertically movable with airtight seal |
| Precision Metering Pump | Model E4-3-R34B, plunger pump with stepping motor and ceramic rotary valve; single stroke up to 174mL, multi-stroke programmable |
| Pneumatic Control | Integrated valve assembly for automated operation |
| Controller | PLC with color touch screen for parameter setting |
| Piping | All liquid lines use PFA plastic; 20L stainless steel storage tank included |
Key Features
Advanced Nozzle Design
The injection nozzle incorporates a stainless steel poppet and Teflon conical valve seat. As a result, it provides reliable closure and precise liquid control without dripping or cavitation.
Bubble-Free Vacuum Injection
A check valve at the nozzle inlet maintains vacuum integrity during the process. Consequently, it prevents bubble formation and ensures complete electrolyte filling.
High Precision Metering
The stepping motor-driven plunger pump with ceramic rotary valve achieves ±1% accuracy. Moreover, you can program multiple strokes for larger volumes up to 295–375mL (350–450g).
Flexible Battery Compatibility
The machine accommodates polymer batteries up to 450×450mm. Thus, it suits both small R&D cells and larger production formats.
User-Friendly Control
You set all injection parameters—volume, program, nozzle operation—via the color touch screen PLC interface. Additionally, pneumatic controls ensure smooth automated cycles.
Clean Fluid Path
All liquid-contacting components use PFA plastic and stainless steel, so they resist corrosion and maintain electrolyte purity.
Working Principle
- Positioning: You place the battery under the vacuum box head.
- Sealing: The head closes, forming a vacuum-tight chamber.
- Evacuation: The system draws vacuum to remove air from the cell.
- Injection: The metering pump delivers the programmed electrolyte volume through the nozzle.
- Shut-off: The poppet valve closes cleanly after each stroke.
- Repeat: If multi-stroke is set, the cycle repeats until the total volume is injected.
- Completion: The head opens, and you remove the filled battery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Single Stroke Injection Volume | 0 – 174 mL |
| Injection Accuracy | ±1% |
| Max Achievable Volume (Multi-stroke) | 295 – 375 mL (350 – 450 g) |
| Battery Size Compatibility | Max 450 × 450 mm (polymer) |
| Production Speed | ~3 batteries per minute (est.) |
| Power Supply | 220V AC |
| Air Supply | 75 PSI |
| Vacuum Source | Customer provided |
| Pressure Gas Supply | Customer provided |
| Metering Pump Model | E4-3-R34B (plunger, ceramic rotary valve) |
| Liquid Storage Tank | 20L stainless steel |
| Liquid Piping Material | PFA plastic |
| Control System | PLC with color touch screen |
| Frame Material | Stainless steel / oxidized aluminum alloy |
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