Two-Layer Single-Door High Vacuum Oven

Ⅰ. Equipment Name:

Two-Layer Single-Door High Vacuum Oven

Ⅱ. Equipment Overview:

Application: Suitable for baking lithium-ion battery electrodes, battery cells, and pre-injection batteries

Ⅲ. Basic Structure of the Equipment:

1. Frame section

2. Inner chamber section

3. Vacuum pumping and nitrogen injection section

4. Electrical control section

5. External circulation section

6. Internal circulation section

7. Cooling system section (optional configuration)

Ⅳ. Working Principle:

Place the battery cells or electrode sheets into the oven, set the heating time, vacuum time, and nitrogen time. The system will automatically carry out heating and timed gas exchange based on the preset time parameters to complete the baking process.

Ⅴ. Equipment Functions:

1. Heating – Includes external and internal heating systems:

U-shaped electric heating tubes with forced air circulation for fast temperature rise

2. Vacuum pumping:

Equipped with a vacuum pump, capable of reaching the set vacuum level within 5 minutes; an alarm is triggered if the set value is not reached

3. Nitrogen injection:

An alarm is triggered if nitrogen is not detected during automatic injection

4. Cooling:

Automatically stops when the temperature drops to the set value

Ⅵ. Equipment Dimensions and Image:

l Internal chamber size: 700 mm (H) × 800 mm (W) × 1300 mm (D) (×2 chambers) (customizable upon request)

l External dimensions: 1870 mm (H) × 1500 mm (W) × 2000 mm (D)

l Equipment color: Off-white (customizable upon request)

Ⅶ. Basic Configuration:

1. Exterior material: A3 cold-rolled steel plate with baking paint treatment, color: off-white

2. Inner chamber material: 304# industrial brushed stainless steel plate, thickness: 5.0 mm

3. Door structure: Single-door, filled with aluminum silicate insulation cotton; pressure-sealed door (automatically sealed upon closing); exterior of the furnace door made of steel plate with paint treatment

4. Sealing ring: Molded silicone rubber O-ring, high-temperature and corrosion resistant

5. Vacuum and nitrogen ports and interface specifications: Ports located at the back; vacuum port: KF40; nitrogen gas inlet: φ12 mm gas pipe connector

6. Control system: PLC automatic control, HMI with touchscreen interface

Ⅷ. System Composition and Configuration Plan:

The system includes:

l 1 high vacuum pump unit (customer-supplied)

l 1 auxiliary cooling system (customer-supplied)

l 1 high vacuum oven

1. Vacuum System:

Vacuum system provided by the supplier. A maximum of two chambers can be vacuumed simultaneously. Once the set vacuum level is reached, the branch valve will close automatically before the other chamber starts vacuuming.

2. Vacuum Technical Parameters:

l Ultimate pressure at pump inlet: ≤10 Pa (no-load condition)

l Single chamber vacuuming from atmospheric pressure to 20 Pa: ≤10 min (no-load)

l Vacuum leakage rate (cold no-load): After reaching ultimate vacuum and closing the valve, vacuum remains at ≤500 Pa within 24 hours

l Vacuum method: Shared vacuum pump for multiple chambers

l No-load ultimate vacuum: ≤20 Pa

l Practical vacuum varies with exhaust volume of the baked material

l Set vacuum levels:

High vacuum: 50–100 Pa (for efficient moisture removal)

Low vacuum: ≤2000 Pa (for nitrogen exchange threshold)

l System includes: Two-stage vacuum pump and pipeline

Vacuum pump: provided by customer or supplier

Vacuum pipeline: according to final confirmed drawings based on the location of the pump and oven

Short distances: stainless steel corrugated hoses provided by supplier

Long-distance piping: to be confirmed in advance with installation party designated

3. Oven Layout Requirements:

l Distance between ovens: approx. 600 mm

l Distance from oven to vacuum pump: <2000 mm

l Distance from oven to chiller: <3000 mm

l Cold air ducts mounted on oven top

l Vacuum pipelines use stainless steel flexible hoses

4. Cooling System:

l Air ducts: 110 mm PVC pipes wrapped with insulation cotton for better thermal retention

l Connection: Pipes connect to oven cooling inlets

l Total cooling power: 4 KW

l Cooling temperature setting: 5–10°C

l Cooling time: 90–150 minutes to reach the set temperature

Ⅸ. Technical Parameters:

1. Vacuum level: Ultimate vacuum per chamber ≤1 Pa; no-load ≤20 Pa; full-load: 50–100 Pa; leakage within 24h ≤500 Pa

2. Heating method: Dual internal and external circulation with infrared and electric heating; dual air duct with side airflow and central suction for uniform temperature distribution

3. Operation mode: Independent control of heating, vacuuming, and nitrogen filling

4. Cooling method: External air cooling via ducts, alternating conduction

5. Main temperature control precision: ±0.5°C

6. Chamber temperature deviation: ±2°C (empty/steady), ±3°C (full-load/steady)

7. Temperature range: Ambient +10°C to 150°C

8. Heating time:

Room temp. to 85°C ≤30 min (no-load)

Stabilization time: 60 min (empty)

Room temp. to 85°C ≤45 min (full-load)

Stabilization time: 80–100 min (full-load)

9. Temperature rise behavior: Curved rise to target, flat during constant temperature

10. Cooling time:

Empty: ≤120 min (from 85°C to 55°C, core probe)

Full-load: ≈150 min (depends on battery size/capacity)

11. Oven surface temperature: Oven at 120°C, surface ≤ ambient +15°C

12. Power supply: 380V / 50Hz, 3-phase 5-wire

Total power (excluding vacuum and cooling systems): 12 KW

Vacuum system: 9 KW

Cooling system: 4 KW

Equipment weight: Approx. 1600 kg

Ⅱ. Technical Specifications and Performance

1. Mechanical Structure and Accessories List

Main components:

1. Frame, inner chamber: self-manufactured

2. Touch screen: 7-inch Kunlun Tongtai

3. PLC: Gumei

4. Temperature controller / Over-temperature protection: Shanghai Yatai

5. Temperature control module: Shanghai Yatai (PID + SSR solid-state relay)

6. Vacuum gauge: Chengzhen / Ruibao / Inficon

7. Leakage protection switch: Chint

8. AC contactor: Chint

9. Vacuum valve: High vacuum baffle valve

Consumables list:

10. Intermediate relay

11. Solid-state relay

12. High-temperature fan

13. Heating tube

Documents provided:

14. Instruction manual

2. Installation Conditions

1. Oven placement: ~600 mm spacing between ovens; vacuum pump within 2000 mm; chiller within 3000 mm

2. Power: Three-phase 380V ±38V, frequency: 50 ±1Hz; customer to provide independent circuit breaker and external power wiring

3. Compressed air: Pressure -0.5 MPa, pipe: φ8 mm

4. Nitrogen: Pressure 0.1–0.2 MPa, pipe: φ12 mm

5. Environment: Temperature -5~35°C, humidity ≤40%

6. Surrounding: No flammable/explosive gases, liquids, or solids

7. Prohibited: Do not bake flammable items, combustible gases, or explosive substances inside the oven