Automatic Pouch Cell Rotary-Table Electrolyte Filling Machine
1. Equipment Description
This machine (rotary-table fixture, one-up/1-out-1) is custom-developed to address the large variety of pouch cell formats on the market, while leveraging the speed advantage of suction-cup filling. An optional suction-cup mode can be selected for large fill ports. It is mainly used for electrolyte filling and sealing production of medium-class and rectangular pouch lithium-ion cells.
2. Overall Machine Structure
3391.5mm(L)*1520mm(W)*1995mm(H)
(Equipment dimensions are for reference only; the final design shall prevail.)
No.
Unit
1
Infeed buffer station
2
Manual loading station
3
Filling station
4
Vacuum degassing station
5
Vacuum sealing station
6
Outfeed buffer station
3. Process Specifications
Pouch cell (per drawing)
l A. Cell length: 80–120 mm
l B. Total cell length: ≤ 30 mm (as provided)
l C. Gas-bag width: ≥ 20 mm
l D. Cell width: 80–150 mm
l E. Gas-bag added width: ≥ 12 mm
l F. Cell thickness: 5–12 mm
Incoming cell notes:
l Cells must have no collapsed edges, no folded tabs, and no irregular gas bags.
l Side-seal margins must be consistent, tolerance ±1 mm.
4. Technical Parameters
No.
Category
Specification / Description
1
Filling method
Atmospheric-pressure filling
2
Filling pump
1-out-1 ceramic-core pump (self-developed patented product)
3
Filling accuracy
±0.03 g of fill mass; max single-stroke 15 g
4
Sealing-head pressure
0.1–1.0 MPa, minimum adjustment resolution 0.1 MPa
5
Degassing time
0.5–99 s adjustable, accuracy ±0.2 s
6
Sealing-head temperature
Room temp–250 °C adjustable, control accuracy ±5 °C
7
Heating rate (sealing head)
Room temp → 200 °C < 15 min
8
Sealing result
Good gel/lamination effect; good sealing tightness
9
First-pass yield
99% (incoming defects excluded)
10
Equipment utilization
95%
11
Equipment efficiency
2 ppm
5. Whole-Machine Hardware/Software System
No.
Module / Station
Qty.
Description
1
Enclosure / guarding
1
l 40×40 square-tube + Q235 welded frame; clean exterior lines; local stiffeners for stability.
l Ergonomic layout with adequate operation/maintenance space; transparent acrylic viewing windows; internal cabling in cable ducts.
l All fixed pipelines are corrosion-resistant; fittings in electrolyte-risk areas are stainless steel.
l Infeed buffer length 1316.5 mm; outfeed buffer length 575 mm.
2
Rotary-table fixtures
4
l Operator places cells into rotary fixtures (1-out-1).
l Indexer-driven table; surface covered with SUS304 for corrosion resistance and easy cleaning.
l Quick changeover with graduated scales on adjustments.
l Fixtures use AL6061 + SUS304 (corrosion-resistant, easy to clean).
3
Atmospheric filling mechanism
1
l Atmospheric filling to cells; gas-bag actuation by vacuum with independent vacuum circuits for chamber and suction cup. No fill when fixture is empty. Fill timeout protection—stops pump immediately if no “fill complete” signal to PLC to avoid contamination.
l Gas-bag opening by stepper motor, stroke set on HMI.
l Waste-liquid box provided.
l EPDM suction cup.
l One needle ↔ one pump; fill mass set on HMI; changeover fill mass set on HMI as well.
4
Vacuum degassing mechanism
1
l Performs vacuum degassing after filling (time adjustable).
l Vacuum ≤ −90 kPa;
l Hold time & cycle count adjustable;
l Vacuum manifold (distributor) included.
5
Vacuum sealing mechanism
1
l Performs vacuum sealing (time adjustable), vacuum to −95 kPa.
l Chamber with quick clamps & guide bearings for rapid removal/maintenance.
l Vacuum manifold included.
l Sealing temperature RT–250 °C adjustable, 1 set of sealing heads.
6
Electrolyte tank system
1
l Two tanks: storage & filling; auto refilling.
l Storage tank supports stirring and vacuuming to mitigate bubbles and prevent underfill/dripping.
l One-key return of electrolyte during product change to reduce operator errors and speed changeover.
l Tank material: SUS304L;
l Seals: EPDM.
l Each storage tank ≥ 5 L with level sensors; if level does not change during feeding, alarm.
7
Control system
1
l PLC-based motion control.
l Alarms for temperature, air pressure, reset; machine runs only when set temperature & pressure are reached.
l Sealing-head temperature set via temperature controller with PV/SV display.
l Auto / Semi-auto / Manual modes with interlocked memory and reliable interlocks between dependent actions. Anti-mis-step foot switch prevents misoperation.
6. Standard Components Configuration
No.
Item
Brand
Notes
1
Pneumatic components
NiuliDe / Airtac
2
Bearings
THK / NSK / Domestic
3
Linear guide
HIWIN / LvGu
4
Stepper motor
Leadshine / Ruite
5
AC motor
Taibang / Chaozan
6
PLC
OMRON / Mitsubishi
7
HMI
Weinview / Kinco
8
Temperature controller
Yatai
9
Vacuum gauge
maxair / Delta / Airtac
7. Machine Overview & Environmental Requirements
Category
Specification
Overall dimensions
3391.5 (L) × 1520 (W) × 1955 (H) mm
Weight
≈ 1.0 T
Floor load
> 2 T/m²
Power (by buyer)
AC 220 V ±10%, 50/60 Hz, 5 kW
Compressed air (by buyer)
0.5–0.7 MPa (5–7 kgf/cm²); 5 L/s; dried, filtered, regulated
Vacuum (by buyer)
≤ −0.095 MPa; 20 L/s
Relative humidity (by buyer)
0–90% RH
Air / dust (by buyer)
No saline, toxic, or corrosive gases; no conductive dust
Magnetic field & vibration (by buyer)
No adverse magnetic field; no shock/vibration
Online service
