Large Current Battery Short Circuit Test Equipment

The Large Current Battery Short Circuit Test Equipment LEGSC applies an external short circuit to battery modules, packs and complete systems and records how the test object responds. A pneumatically driven contact closes the short and a vacuum interrupter breaks it, so the arc does not damage the main contact. The test procedure is referenced to IEC 62619, and UL 2580 is also listed.

How it works

The positive and negative terminals of the test object are joined through the short-circuit path. The referenced procedure limits connection resistance, wiring included, to 5 mΩ, and the internal resistance of the equipment is chosen from options below 1, 5, 10, 20, 50 or 100 mΩ. The short is held until the protective function of the test object interrupts the current, or until the case temperature is stable (gradient below 4 °C in 2 h) and one more hour has passed. The object is then observed for 2 h at room temperature.

The equipment works at ambient temperature; the procedure calls for 20 ±10 °C, or higher at the battery maker's request. Voltage, current and temperature are logged on isolated remote channels at 100 Hz, with voltage measured from 0 to 1000 V. Short-circuit response time is 20 ms or less. Data are exported by USB or data card.

What is included

• Short-circuit unit with pneumatic contact drive and vacuum interrupter
• Data acquisition module with voltage, current and temperature channels
• PLC touch screen, computer remote control and remote controller
• Alarms for electric leakage, over-current and smoke, with sound and light signals
• Test fixture made to the actual test condition

Specify for your project

• Test object: module, pack or system, its voltage and expected short-circuit current
• Model and internal resistance option
• Number of voltage, current and temperature channels
• Room safety equipment: video monitoring, explosion protection, smoke exhaust and explosion-proof lighting
• Explosion-proof cabinet, W2000 × D3000 × H2000 mm, if required

This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.

Relevant standards requirement

1. Test object: battery pack and system

2. Test conditions:

• The test temperature should be at 20±10℃or higher. (According to the battery system manufacturer’s request).
• All protective Equipments that affect the function of the test objects and related to the test results shall be in normal operation when the test starts.

3. The main contactors used for charging and discharging should be closed to indicate the feasible vehicle mode and the mode of allowing external charging. If is it not available to be completed in one single test, process two or more tests.

4. The positive and negative terminals of the test object being connected to each other to create a short circuit. The resistance of the connection (including wiring) used to create short circuit should not exceeding 5mΩ.

5. Keep short circuit until any of the following conditions are met and the test is completed.

• The protective function of the test object works and the short circuit current is terminated.
• After the temperature of the test object’s shell is stable (the temperature gradient is less than 4℃within 2h), the short circuit will continue for at least 1h.

6. After testing, observe for 2h under room temperature.

Main Features

• Vacuum Interruption, avoid electric arc to occur damage of contactor.
• Oxidation resistance condition of the main contact parts, ensure long operation time for high current and resistance.
• Data Acquisition: Temperature, voltage and current acquisition channels (Available for multi-channels.)
• Control Mode: Touch screen control + computer remote control + Remote controller.
• Battery Short Circuit Test Equipment Standard
• UL 2580

Technical Parameters