Laboratory temperature controlled battery short circuit tester

Introduction

The temperature-controlled battery short-circuit testing machine is designed according to the requirements of various battery short-circuit test standards. According to the standard, the short-circuit device must meet the internal resistance range of ≤5mΩ, so as to obtain the maximum short-circuit current required by the test; in addition, in the circuit design of the short-circuit device It must also be able to withstand the impact of large currents, so we chose industrial-grade DC electromagnetic contactors, all-copper terminals and internal copper plates for diversion. The wide and thick copper plates can effectively improve the heat dissipation effect, make the high-current short-circuit device safer, and effectively reduce the test equipment The loss to ensure the accuracy of the test data.
The short circuit tester adopts PLC automatic control to simulate the external short circuit of the battery, and meets UL1642, UN38.3, IEC62133, GB/T18287, GB/T 31241-2014 and other standards. Record battery voltage, current and surface temperature changes. The short-circuit test machine must have a resistance of 80±20mΩ across the circuit (including circuit breakers, wires and connecting devices), and each circuit can withstand a short-circuit current with a peak value of 1000A. You can choose the short-circuit stop mode: 1. Short-circuit time; 2. Battery surface temperature.

Test standard requirements

After the battery is fully charged in accordance with the specified test method, place it in an environment of 55°C ± 5°C, and place it for another 30 minutes after the battery temperature reaches 55°C ± 5°C. Then connect the positive and negative terminals of the battery with wires, and ensure that all external resistances are 80mΩ±20mΩ. Monitor the battery temperature change during the test. When one of the following two situations occurs, the test is terminated.
a) The battery temperature drops to 20% lower than the peak value; b) The short-circuit time reaches 24h.
Test result: the battery should not fire or explode, and the maximum temperature should not exceed 150℃

SPECIFICATIONS

Control method	PLC touch screen control system (with remote control)
Voltage	0-100V
Short-circuit current	0-1000A
Temperature control box	Normal temperature～150℃
Battery surface temperature collection	Temperature sensor: -20℃~130℃ thermocouple
Temperature control accuracy	0.1℃
Temperature uniformity	±1℃
Temperature control explosion-proof box test space	500*500*500 mm, can be customized
Working voltage	AC 220V, 50/60Hz
Impulse voltage	AC 1kv/1.2-50μs (peak value) 1min
DC response time	≤5μs
Device internal resistance	80±20mΩ (load current 400A)
Action time	Pull-in time/release time ≯30ms
Action characteristics	Cold pull-in voltage ≯66% Us
Cold release voltage	≯30% Us, ≮5% Us
Exhaust fan	Dia 100mm exhaust pipe extends at the rear
Air supply port	There are two dia 50mm air supply ports on the left side of the box (also used to measure voltage, etc.)
Window size	300*300mm, tempered explosion-proof glass with a thickness of 20mm. A movable stainless explosion-proof steel wire screen is installed in front of the glass to increase safety performance and facilitate extraction and cleaning.
Weight	About 100Kg
Power supply	AC220V, 50/60Hz