Cylindrical Cell Electrolyte Filling Machine with Differential-Pressure

1. Equipment Introduction:

Mainly used for differential-pressure electrolyte filling of lithium-ion cylindrical cells; realizes manual loading/unloading of cylindrical cells, automatic in-cell vacuuming, electrolyte filling, cyclic vacuum pressurization degassing, and automatic cleaning of the filling cups, etc.

2. Process Flow

3. Technical Parameters:

Category	Process Technical Parameters
Equipment filling accuracy	≤ 200 g ± 8‰ g (single measurement accuracy)
Filling-pump delivery precision	Intelligent adjustable pump ≤ ±5‰ g (single measurement accuracy)
Filling method	Pressurized cyclic multiple filling
Filling-pump service life	≥ within one-year warranty period
Degassing method	Multiple pressurized cyclic degassing
Degassing time	1–99 s arbitrarily set (Note: degassing pressurization time directly affects equipment efficiency); acceptance cell according to total degassing time: 200 s
Equipment utilization	98% (refers to failure rate caused by the equipment; scheduled maintenance, pre-production preparation, and material changeover are not included)
First-pass yield	99.4% (excluding incoming-material defects; e.g., overly high winding tension, degassing pressurization time set too short, and other process-induced defects)

 

4. Applicable Specifications:

Cylindrical cell size drawing

 

l Outer diameter D compatibility: Ø46

l Shoulder height L compatibility: 40–120 mm

l The equipment is equipped with one set of cell fixtures.

 

5. Brief Introduction of Each Mechanism of the Equipment:

5.1 The equipment is used inside a dry room.

5.2 The production materials are taken out of the oven in advance, cooled, and then placed at the equipment loading end.

5.3 The operator manually takes the cell from the loading end and places it into the magazine (clip) for positioning; after pressing the start button, the cell is first vacuumed and then filled.

(1) Realize the method of vacuuming first, then filling for the cell.

(2) Remove the mechanical motion of sealing the filling needle orifice.

5.4 Filling and pressurization degassing functions (Note: the number of fillings and pressurizations can be freely set according to the production process; pressurization degassing time directly affects the equipment production efficiency.)

 

6. Whole-Machine Mechanisms:

No.	Mechanism Name	Qty.	Description
1	Filling mechanism	2	a) One filling-pump head corresponds to one cell.     b) Filling-amount parameter adjustment.     c) Uses differential-pressure filling mode.     d) The filling cup is designed with a stainless-steel cup body, realizing the method of vacuuming first, then filling for the cell.     e) Equipped with 2 sets of filling cups.     f) Filling cup ≤ 200 g.
2	Electrolyte tank system	1	a) Equipped with two tanks: storage tank and filling tank.     b) Automatic liquid feeding function.     c) The storage tank is equipped with a degassing function; after bubble removal, the electrolyte flows into the filling tank.     d) The inlet is equipped with a filter screen.     e) Low-level alarm for storage tank.     f) Low-level in filling tank → machine stop alarm.     g) Tank material: SUS316.     h) Seals are corrosion-resistant (EPDM).     Each storage tank capacity ≥ 5 L; each storage tank shall be installed with 4 level sensors to detect the level status; during liquid feeding, if the level does not change, the equipment shall alarm.
3	Filling pump (variable pump)	4	a) Filling amount set on touchscreen, automatic adjustment.     b) Precision ceramic valve with reciprocating rotary motion.     c) Static seals: EPDM.     d) Ceramic pump core: alumina, wear-resistant.     e) High filling accuracy: ≤ ±5‰ g.
4	Control system	1	The whole machine is controlled by industrial PC and PLC as the control core.
5	Machine fixed frame	1	a) Welded square-tube construction, ensuring stable operation.     b) Layout, operation, and maintenance conform to ergonomics, with sufficient space reserved for personnel operation and maintenance.     c) Machine-cover observation windows adopt transparent acrylic.     d) Footings are reasonably distributed—overall at the four corners, with local reinforcement arranged reasonably where needed.     e) Sufficient cooling fans are arranged around the electrical cabinet; all fans use independent power; there is lighting inside the cabinet, and the lighting circuit has an independent breaker.     f) Internal wiring uses cable trays.

 

7. Standard Configuration:

No.	Name	Brand	Remarks
1	Cylinder / Solenoid valve	SMC / Airtac
2	Vacuum gauge	Panasonic
3	Pneumatic accessories	Airtac / Domestic
4	Linear guide	HIWIN
5	Ball screw	HIWIN
6	Linear bearing	YTP / HRB
7	Servo motor / Driver	Delta / Inovance
8	PLC	Panasonic / Omron / XINJE
9	Touchscreen	XINJE / Weintek
10	Stepper motor	Jianghua Motor / Taiwan
11	AC motor	Taiwan
13	Intelligent electrolyte pump	Dongguan Jiyanda	Variable pump
14	Electrical control system	Delixi / Chint

 

8. Overview of Whole Machine & Environmental Requirements:

Category	Specification
Overall dimensions	L × W × H ≈ 800 × 800 × 2800 mm
Weight	0.5 T
Floor load-bearing	> 500 kg/m²
Power supply (by Buyer)	Voltage: Two-phase AC220V ±10%, 50 Hz; Power: 4 kW
Compressed air (by Buyer)	Pressure: 0.5–0.7 MPa (5–7 kgf/cm²); Usage: < 100 L/h; dried, filtered, regulated
Vacuum (by Buyer)	≤ −0.095 MPa; vacuum gas consumption: < 100 L/h
Dry gas	Dry gas consumption: < 130 m³/h
Relative humidity (by Buyer)	0–90% RH
Air / Dust (by Buyer)	No saline gas, toxic or corrosive gases; no conductive dust
Magnetic field & vibration (by Buyer)	No magnetic field affecting the device; no shocks or vibration

 

9. Spare-Parts List:

No.	Name	Specification / Model	Qty	Manufacturer
1	Filling-cup sealing nozzle	Material: EPDM	8 pcs	TMAX
2	Inner seal of filling cup	Material: imported PTFE	10 pcs	TMAX
3	Fuse	10 A	5 pcs	Luko
4	Hex wrench set	1.5–10 mm	1 set	TGK
5	Open-end wrench set	6–22 mm	1 set	—
6	Adjustable wrench	Adjustable wrench	1 pc	—
7	Screwdrivers	101 flathead, 101 Phillips	1 each	—
8	Toolbox	—	1 pc	—