Automatic Pouch Cell Four-Station Vacuum Electrolyte Filling Machine

1. Equipment Overview

Mainly used for vacuum electrolyte filling of pouch lithium-ion cells. The workflow includes manual loading/unloading, automatic vacuum filling, vacuum degassing (static), shaping, and automatic vacuum sealing.

The overall structure is as shown in the schematic diagram. (Subject to the final machine.)

 

2. Equipment Technical Parameters

2.1 Incoming Cell Parameters: Sealed pouch cells

 

No.	Name	Size (mm)	Tolerance	Remarks
A	Cell length A	200–500	—	—
B	Cell width B	100–280	—	—
C	Total cell length C	220–550	—	—
D	Case width D	100–350	—	—
E	Cell thickness T	5–15	—	—
F	Sealing size F	5–12	—	—
G	Seal width	1.5–5	—	—

 

2.2 Filling / Degassing / Sealing Parameters

Section	Item	Spec
Electrolyte	Composition	Organic
	Density	1.0–1.5 g/cm³
Filling & Degassing	Filling method	Single-head electric pump, one-shot filling under vacuum
	Filling accuracy	For ≤ 400 g, accuracy ±0.5% g (depends on pump precision)
	Filling mass range	50–1000 g
	Post-seal filling accuracy	Weight after sealing vs. pre-fill weight ±0.5% g
	Degassing method	Two-stage static degassing, max vacuum −0.08 MPa
	Degassing time	1–99 s adjustable (note: degassing time directly affects efficiency)
Sealing	Seal width	5 mm ±0.1 mm (4–8 mm changeable)
	Seal length	520 mm ±0.2 mm
	Pressure	0.1–1.0 MPa, min adj. 0.1 MPa
	Time	0.5–99 s adjustable
	Sealing-head temperature	Room temp–250 °C adjustable; accuracy ±1 °C
	Sealing result	Surface flat, no wrinkles, no bubbles; aluminum-laminate does not delaminate; good tightness
	Seal bar material	Toothed brass
	Temperature display	Display vs. actual deviation ±1 °C
	Temperature uniformity	Max point-to-point deviation ≤ ±2 °C
	Temperature ramp	25 °C → 200 °C < 20 min
Product / Performance	First-pass yield	≥ 99% (incoming defects excluded, e.g., bag too short to fill)
	Equipment failure rate	≤ 5% (machine-caused only; excludes PM, pre-production, etc.)
	Throughput (actual)	≥ 6 PPM (assumes three acceptance-model cells per fixture)
	Throughput (dry-run)	≥ 8 PPM (assumes three acceptance-model cells per fixture)
	Appearance	Flat, no wrinkles, no leakage or dripping
	Total machine weight	≈ 1.5 t; weight / floor area ≤ 500 kg/m²

3. Main Machine Structures

3.1 Fixture Turntable Mechanism

1. Four-station indexing turntable.

2. 1-out-1 cell fixture (illustration may show 1-out-2; for reference only).

3. Turntable support mechanism.

4. Fixture opening at the loading position; manual loading/unloading.

 

3.2 Filling Mechanism

1. After cell is in position, the filling chamber lowers to press and seal against the baseplate.

2. Chamber evacuation; an aluminum-foil opening manipulator opens the gas bag to prepare for filling.

3. Filling needle descends into the gas bag and filling starts.

4. Vent to atmosphere; filling chamber rises; the fixture indexes to the next station.

5. Independent filling system injects the electrolyte.

6. The vacuum filling station is equipped with an electrolyte storage tank and degassing device to remove bubbles. The pump is above the storage tank; during long stops, pump & storage tank form a dedicated circulation loop.

7. The main inlet has a manual shut-off valve and can connect to the customer’s electrolyte supply line.

8. Filling-chamber vacuum: rated −80 to −85 kPa with real-time monitoring & alarm. Chamber sealing performance: ≤ −5 kPa / 60 s.

9. Time from atmosphere to rated vacuum ≤ 4 s; vacuum hold not required. (Plant must provide vacuum source ≥ 350 m³/h, vacuum −101 to −80 kPa.)

10. Max fill mass ≤ 1000 g. No cylinders inside the vacuum chamber; observation window provided.

 

3.3 Degassing & Shaping Mechanism

1. Chamber lifting mechanism.

2. Gas-bag shaping mechanism.

 

3.4 Vacuum Sealing Mechanism

1. After fixture is in position, the sealing chamber lowers to press and seal against the baseplate.

2. Completes evacuation → sealing → vent.

3. Sealing chamber rises; the fixture indexes forward.

4. Atmosphere to rated vacuum ≤ 4 s; vacuum hold 3 s. Sealing-chamber vacuum rated −85 kPa, with real-time monitoring & alarm.

5. Perform sealing after vacuum hold completes.

6. Independent sealing head for each cell; head material NAK80.

7. Max sealing-head working temperature 220 °C; max temperature difference across the head ±5 °C; real-time temperature monitoring & alarm.

8. Each sealing-head cylinder equipped with a digital pressure gauge; set a pressure window—alarm if out of range.

9. Stroke sensor on each sealing-head cylinder—alarm if not in position.

 

 

3.5 Electrolyte Handling Mechanism

4. Basic Utilities & Installation

Power

l Three-phase five-wire AC380 V, 50 Hz, voltage fluctuation +10% / −10%; max start power 3 kW.

Compressed Air

l 0.6–0.8 MPa, pressure fluctuation ±1%; dry, oil-free, filtered, regulated.

l Consumption: 0.3 m³/h.

 

Machine Specifications

1. Weight: ≈ 1.5 t.

2. Overall size: L 2.0 m × W 1.85 m × H 2.2 m (incl. electrical cabinet; excludes service aisles).

3. Appearance: Aluminum parts natural anodized; all stainless external parts matte stainless. No metal-to-metal collision in moving parts. Cylinders may use copper; all other exposed/connector parts No-Copper. Paint smooth/glossy; color PANTONE – International Standard Warm Gray 1C.

 

Environment

1. Ambient temperature 25 °C ± 3 °C.

2. Relative humidity 10–30% RH; dry, well-ventilated; no acidic/alkaline corrosives.

3. Protective grounding required.

4. Floor load > 500 kg/m².

5. Within one week after contract signing, the Seller will provide foundation & layout drawings.

5. Major Subsystems & Configurations

Machine composition: four-station fixture turntable; filling subsystem (storage + filling); vacuum degassing; vacuum sealing; frame & guarding; control system.

5.1 Four-Station Turntable

No.	Item	Technical Parameter
1	Four fixture sets	1-out-1 cell fixtures
2	Four-station turntable	Indexing drive, positioning repeatability ±0.1

5.2 Filling Subsystem

No.	Item	Technical Parameter
1	Storage subsystem	Storage tank, filter tank, filling tank
2	Pump & valve	Single-head filling pump, one-shot, model FSH-FMI2020-A-D
3	Suction-cup mechanism	Opens the gas bag of the cell
4	Vacuum chamber	Negative pressure −80 to −85 kPa; vacuum filling starts

5.3 Degassing Subsystem

No.	Item	Technical Parameter
1	Vacuum chamber	Negative pressure −80 to −85 kPa; degassing time settable
2	Flattening mechanism	Flattens the gas bag to prepare for vacuum sealing

5.4 Vacuum Sealing Subsystem

No.	Item	Technical Parameter
1	Vacuum chamber	Negative pressure −80 to −85 kPa for vacuum sealing
2	Sealing knife/head	Heated sealing

5.5 Control System

No.	Item	Technical Parameter
1	Main control	Weinview HMI, Panasonic or Mitsubishi PLC
2	Modes	Manual / Auto / E-Stop; master HMI on main unit
3	Alarms	Three-color tower light; HMI shows corrective page on fault/start
4	Safety	1) Mechanical & electrical interlock/self-lock, sensor guarding. 2) E-stop at manual station. 3) Guards for all transmission/motion parts. 4) All drive motors with overload protection (trips on overload).

6. Component Brands & Spare Parts

6.1 Key Component Brands

Component	Brand	Origin
Cylinder	Airtac	Taiwan
Stepper motor	JMC	China
Servo motor	Panasonic	Japan
Linear guide	HIWIN	Taiwan
Ballscrew	TBI	Taiwan
Speed-regulation motor	Yongkun	Taiwan
HMI	Weinview	Taiwan
PLC	Panasonic / Mitsubishi	Japan
Solenoid valve	Airtac	Taiwan

6.2 Delivery (Accessories) List

No.	Item	Brand	Qty.	Remarks
1	Magnetic sensor cable	Airtac	5 pcs	—
2	Solenoid valve	Airtac	2 pcs	—