High Low Temperature Low Pressure Test Chamber -40°C to +70°C 5kPa

Performance

Cooling method

Air-cooled

Temperature range

-40℃~+70℃

Temperature fluctuation

≤ 0.5℃ (ambient pressure, no load)

Temperature deviation

≤±2.0℃(ambient pressure, no load)

Heating time

20℃ → +100℃, ≤ 30 min (ambient pressure)

Cooling time

20℃ → -40℃, ≤ 30 min (ambient pressure)

Pressure range

Ambient pressure ~ 5 kPa (commonly 11.6 kPa)

Pressure deviation

≤ ±2 kPa (≥ 40 kPa)

≤ ±5% (2–40 kPa)

Pressure–temperature integrated controllable range

Pressure fluctuation

≤ ±2 kPa (1 bar ~ 40 kPa); ≤ ±5% (40 kPa ~ 2 kPa)

Depressurization time

≤ 30 minutes to 5 kPa

Program Requirements

The test batteries and battery packs shall be stored at a temperature of 75 ± 2°C for at least 6 hours, followed by storage at a temperature of -40 ± 2°C for at least 6 hours. The maximum time interval between the two extreme test temperatures shall be 30 minutes. This cycle shall be repeated 10 times. Afterward, all test batteries and battery packs shall be stored at ambient temperature (20 ± 5°C) for 24 hours. For large batteries and battery packs, the exposure time at the extreme test temperatures shall be at least 12 hours.

Structural Features

Sample specifications

Selectable voltage: 12 V, 24 V, 36 V, or 48 V

Maximum battery size: W720*H480*D600 mm

Weight: 280 kg

Max voltage: 56 V

Max current: 300 A

Inner chamber dimensions

W*H*D: 1000*1000*1000 mm

Outer dimensions

W*H*D: 3250*1400*2000 mm (excluding protrusions)

Outer wall material

1.5 mm painted iron sheet

Inner wall material

SUS304 stainless steel (5 mm, pressure-bearing structure)

Insulation material

Rigid polyurethane foam

Chamber door

Single door with explosion-proof handle, viewing window, internal lighting

Lead-through & terminal posts

One Φ100 mm lead-through on left side; sealed terminal flange

Manual inflation valve

For manual pressure equalization during power failure

Shelves

Two stainless steel shelves

Chamber heater

Stainless steel finned tube heater

Heater control

SSR (solid state relay) pulse-width modulation

Vacuum pump

VD401 ULVAC direct-drive, air-cooled, single-stage rotary vane vacuum pump (with oil mist filter, oil sight glass, and gas ballast valve)

Vacuum sensor

UNIK 5072 (GE, USA),

Range: 0–200 kPa,

Accuracy: ±0.2% FS.BSL,

Output: 4–20 mA,

Pressure interface: G1/4 internal thread

Refrigeration System

Working method

Air-cooled, mechanical compression, dual cascade

Compressor

Mechanical compressor

Evaporator

Finned copper tube heat exchanger

Condenser

Air-cooled shell-and-tube

Refrigerant

R404a / R23 (non-fluorinated, eco-friendly, ODP = 0)

Accessories

Dryer, oil separator, refrigerant sight glass, service valves

Explosion-Proof System

Pressure relief

Two 300*300 mm explosion-proof vents with doors; opens when chamber pressure ≥ 0.01 MPa, connected with high-strength hinges and stainless steel chains

Fire suppression

CO₂ system with remote automatic and manual control

Explosion-proof chains

Two chains on main door to prevent door from popping open

Electrical Control System

Controller

7-inch TFT color LCD

Operation mode

Program mode / fixed value mode

Programming

Chinese menu, touch-screen input

Program capacity

Max 20 programs, 1000 steps, 20 cycles (max 99 steps per cycle)

Display

Set values (SV) and actual values (PV) of temperature, humidity, and pressure are displayed directly.

Current program number, step, remaining time, cycle count, and operating time.

Program editing, graphical curve, and the status of fixed-point or programmed actions display.

Resolution

Temperature: 0.01℃; Humidity: 0.1%; Time: 1 min

Over/under temperature protection

Configurable alarms

Input

Thermocouple / RTD / Voltage / Current

Control

Anti-integral saturation PID (BTHC/BTPC)

Data logging

Battery-backed RAM, can store the device’s set values, sampled values, and the corresponding sampling timestamps;

Max 60 days (sampling interval 1.5 min)

USB function

1 GB flash drive, PC software for program management and data export

Communication interface

RS232, RS485; remote control and monitoring, multi-machine sync control

Power-off memory

Configurable to heat/cool/stop on recovery

Timer

Auto start/stop

Auxiliary Functions

Fault alarm code display, power-off protection, and self-diagnosis functions.

Network Connectivity

Can be connected to an Ethernet network via specialized software, enabling remote control, remote assistance, and test data acquisition. Multiple machines can be controlled simultaneously over the network.

Control Panel

a. Emergency stop switch

b. Power switch

c. Over-temperature protector

d. RS-485 interface

e. USB interface

Safety Protection

Refrigeration system

Overheat, overcurrent, high pressure protection for compressors

Test chamber

Adjustable over-temperature protection, chamber fuses, air duct over-temp, fan overheat, heater overcurrent and fuse

Other

Phase sequence, leakage, overload, short-circuit, vacuum pump motor protection

Operating Conditions

Power supply

AC 3φ 4W 380V 50Hz (R.S.T.N + PE), ±10% voltage fluctuation

Compressed air source

4–7 kg/cm²(Customer-Supplied)

Ambient temperature

5–35℃

No.

Component

Brand

Remarks

1

Compressor

Bitzer

2

Oil separator

Emerson, USA

3

Plate heat exchanger

GEA, Germany

4

Pressure switch

DANFOSS, Denmark

5

Condenser

Kunlin

6

Evaporator

Guangzhou Yongqiang

7

Dryer

DANFOSS, Denmark

8

Expansion valve

DANFOSS, Denmark

9

Expansion valve

HONEYWELL, USA

10

Solenoid valve

Nickideu, Japan

11

Solenoid valve

DANFOSS, Denmark

12

Controller

Tenglong

13

Leakage breaker

Shihlin, Taiwan

14

Circuit breaker

Schneider, France

15

AC contactor

Schneider, France

16

Thermal relay

Schneider, France

17

Phase sequence relay

Siel, Switzerland

18

Solid-state relay

Siel, Switzerland

19

Intermediate relay

Omron, Japan

20

Circulation motor

TECO, Taiwan

21

Vacuum pump

ULVAC VD401 3φ 380V

22

Vacuum valve

RIKEN AVB-KF-40-P, Japan

23

Vacuum sensor

GE UNIK 5072