Project Description

Battery External Short-circuit Tester

Lithium-ion Battery Electrical Abuse Test Equipment China Supplier

Battery External Short Circuit Tester is used to simulate the unintentional and incorrect electrical connection of the cell/battery terminals by connecting both the positive and negative terminals to an external resistor.

After an external short circuit occurs, whether the specimen will cause safety events, such as venting, rupture, thermal runaway, fire, or even explosion, is observed and determined.

The external short circuit tester is one of critical lithium-ion battery testing apparatuses.

External short Circuit testing of cells or batteries is one of the basic tests used to evaluate the electrical performance of overcurrent protection devices or the safety of lithium-ion or other secondary cells/batteries.

cylindrical cells

cylindrical cells

Battery Module

Battery module

Pouch cell and pack

Pouch cell & pack

Lithium-ion Battery Pack

Lithium-ion battery pack

Short Circuit Devices

AMADE TECH temperature-controlled battery short-circuit tester is designed in combination with the requirements of various test standards.

The contactors are used as switching elements, and thermal relays are used as protection devices.

The short-circuit devices meet the external resistance values, including: (80±20) mOhm, ≤ 100 mOhm, (20±10) mOhm, (30±10) mOhm, or ≤ 5 mOhm, to obtain the maximum short-circuit current required by the test.

In addition, the circuit design of the short-circuiting device also ensures that it can withstand the impact of large currents.

Polymer battery external short-circuit testing

This battery external short-circuit tester adopts a vertical box structure, and the test area is located in the upper area of the equipment to facilitate the operation of users.

The test chamber has a built-in temperature measuring device, heating device, air convection system, pressure relief port, short-circuit clamp for the cells, External resistance cable, battery surface temperature testing apparatus.

Various control functions are integrated into PLC and a high-definition touch screen of the external short-circuit testing machine.

You can easily set various parameters and test conditions on the touch screen, such as short-circuit duration, drop ratio of temperature rise, over-temperature protection value, etc. Battery case temperature, peak temperature, battery voltage, current, and other parameters can be displayed on the screen in real-time. It allows you to complete the test in either manual or automatic mode.

Battery pack external short-circuit testing

Test Principle of the External Short Circuit Tester from AMADE TECH

The positive and negative terminals of the sample cells/batteries inside the chamber are attached to the specified wire ends. When the circuit breaker is closed, the circuit of the cell/battery under test is short-circuited, and a strong short circuit current flows through the entire circuit. At this time, the entire circuit (including circuit breakers, wires, and connecting devices) meets the specified resistance value. The acquisition element detects the battery surface temperature and voltage and feeds back to the PLC main control unit to achieve the purpose of intelligent control.

Model AT-L5002
Working Voltage AC 220 V or 110 V, 50 Hz / 60 Hz
Impact Voltage AC 1 kV / 1.2 – 50 μs 1 min
Maximum Measurable Battery Voltage 100 V
HVDC Response Time ≤ 5 μs
Max. Circuit Current 1000 A
External Resistance (80±20) mOhm(Standard configuration, other specifications are optional)
Remote Control Distance 7 meters
Test Temperature Control Range RT + 10 ~ 100℃
Current, Voltage, Temperature acquisition channels Total 3 channels (Standard configuration. The acquisition channel can be expanded)

Current – 1 channel

Voltage – 1 channel

Temperature – 1 channel

Conditions for the End of the Test
  • Short circuit duration
  • Percentage of battery case temperature dropped to peak temperature
Short Circuit Modes Room temperature short circuit (20 ± 5℃)

High temperature short circuit

Actuation Time Response time / releasing time ≤ 30 ms
Mechanical Life 300,000 times
Temperature Control Accuracy 0.1℃
Temperature Uniformity ± 2℃
Temperature Fluctuation ± 0.5℃
Interior Test Chamber Size 500 mm × 500 mm × 500 mm (Other sizes can be customized)
Optional or Custom Accessories
  • Holders for cylindrical cells, coin cells
  • External resistance connecting cables
  • Fire extinguishing system
Working Environment Temperature: 5℃ ~ 35℃, humidity: 20 ~ 85% R.H
Supply Power AC 220 V, 50 Hz, 15 A or AC 110 V, 60 Hz

UN 38.3, IEC 62133, IEC 62660-2/3, IEC 62619, EN 50604-1, ISO 12405, ECE R100, SAE J2464 / J2929, UL 2580, etc.

Lithium-ion External Short-circuit Tester Features

  • The outer box is made of cold-rolled steel plates. The surface is treated with baking paint, which is rust-proof and beautiful.

  • The inner box is made of stainless steel and is reinforced with reinforcing ribs. If the battery tested in the box explodes, the inner box will not be deformed.

  • The equipment is equipped with a visible explosion-proof glass window coupled with lighting to facilitate the observation of the sample under test.

  • The interior chamber is equipped with a smoke exhaust port and an explosion-proof pressure relief port.

  • Configured with a high-definition touch screen for you to set parameters and monitor the entire test process.

  • The battery’s external short circuit test process is controlled by PLC.

  • Supports acquisition of voltage, current, and case temperature during the test.

  • Two types of test end condition settings are supported.

  • Supports wireless remote control for testing.

  • Explosion-proof chains are fitted between the door and the box frame to further protect people in case of explosion.

  • Different holders for various battery types are available.

  • Test data can be automatically recorded and stored, and test data can be generated and exported.

  • Casters are installed at the bottom of the equipment to move and fix conveniently.

  • Equipped with various protection mechanisms, including grounding protection, over-current protection, leakage protection, short-circuit protection, over-temperature protection, etc.

FAQ

The table below is a comparison of the external short circuit test conditions specified by various standards (This is only a partial list of standards. For more, please let us know your test standards.)

Standards or regulations UN38.3 IEC62133 UL1642 IEC 62660-2/3 IEC 62619 EN 50604-1 ISO 12405-1/2/3
DUT Cell, module, Pack Cell, module Cell Cell, module,pack Cell, module Pack Pack
External resistance (mΩ) ≤ 100mOhm (80±20)mOhm (80±20)mOhm ≤ 5mOhm (30±10)mOhm (20±10)mOhm (20±10)mOhm
Test Temperature (57±4)℃ (55±43℃, RT R.T. R.T. (25±5)℃ R.T. R.T.

The external short circuit test of lithium-ion batteries is an important means to test the safety of lithium-ion batteries in the case of abuse and optimize the battery structure design.

The external short-circuit test connects the lithium-ion battery to a fixed-value resistor. The external resistance is close to or even smaller than the internal resistance during the test. At this time, most of the voltage will be added to the internal resistance, and the output voltage of the external circuit will decrease. Suppose the voltage on the internal resistance of the battery is too large. In that case, the heating power will be very high, and a large amount of heat is generated inside the lithium-ion battery in a short time, which will burn the battery. Due to the limitation of the structure of the lithium-ion battery, the heat cannot be quickly diffused to the outside of the battery, resulting in an excessively high temperature of the lithium-ion battery, which may cause the decomposition and combustion of the active material and the electrolyte, resulting in thermal runaway.

If the lithium-ion battery can pass the external short-circuit test, it proves that the lithium-ion battery is very safe under this kind of abuse.

Send an Inquiry

Please feel free to contact us for more details on the product, price, lead time, payment terms, shipment methods, etc. AMADE TECH sales engineers will respond within one working day.

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