The temperature-controlled battery short-circuit Tester is designed based on the requirements of various battery short-circuit test standards. According to the standard requirements, the short-circuit device must meet the internal resistance range ≤ 5mΩ, so as to obtain the maximum short-circuit current required by the test; in addition, the circuit design of the short-circuit device must also be It can withstand the impact of high current, so we have selected industrial-grade DC electromagnetic contactors, all-copper terminals and internal copper plates for current conduction. 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 loss of test equipment. , to ensure the accuracy of the test data.
The short-circuit testing machine adopts PLC automatic control to simulate the external short-circuit of the battery, and meets the standards of UL1642, UN38.3, IEC62133, GB/T18287, GB/T 31241-2014 and so on. Record battery Voltage, current and surface temperature changes. The short-circuit testing machine requires the resistance of the entire circuit (including circuit breaker, wires and connecting devices) to be 80±20mΩ, and each circuit can withstand a peak short-circuit current of 1000A. Short-circuit stop mode can be selected: 1. Short-circuit time; 2. Battery surface temperature.
GB 31241-2014 "Safety Requirements for Lithium-ion Batteries and Battery Packs for Portable Electronic Products"
MT/T 1051-2007 "Lithium-ion batteries for miner's lamps"
SJ/T 11169-1998 (UL1642: 1995) "Safety Standards for Household and Commercial Batteries"
YD 1268-2003 "Safety Requirements and Test Methods for Lithium Batteries and Chargers of Mobile Communication Handsets"
GB/T 19521.11-2005 "Safety Code for Inspection of Hazardous Properties of Lithium Battery Pack Dangerous Goods"
GB/T 18287-2013 "General Specification for Lithium-ion Batteries for Cellular Phones"
SJ/T 11170-1998 (UL2054: 1997) "Safety Standards for Household and Commercial Batteries"
UN 38.3 "Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria", Part III, Section 38.3
UL 1642 "Lithium Battery Standard" 2054 "Household and Commercial Battery Packs"
IEC62133-2012 "Battery cells and battery packs containing alkaline or non-acid electrolytes - Safety requirements for sealed batteries and battery packs for portable equipment"
GB/T 8897.4-2008 (IEC 60086-4:2007) "Primary Battery Part 4 Safety Requirements for Lithium Batteries"
YDB 032—2009 "Communication backup lithium-ion battery pack"
YD/T 2344.1—2011 "Lithium Iron Phosphate Battery Pack for Communication Part 1: Integrated Battery Pack"
GB/T 21966-2008 (IEC 62281:2004) "Safety Requirements for Lithium Primary Batteries and Storage Batteries in Transport"
After the battery is fully charged according to the specified test method, place it in an environment of 55°C ± 5°C, and wait for the battery temperature to reach 55°C ± 5°C, and then place it for 30 minutes. Then connect the positive and negative terminals of the battery with wires, and ensure that the total external resistance is 80mΩ±20mΩ. During the test, the temperature change of the battery is monitored. When one of the following two situations occurs, the test is terminated.
1) The battery temperature drops to 20% lower than the peak value;
2) The short-circuit time reaches 24h;
3) Test results: The battery should not catch fire or explode, and the maximum temperature should not exceed 150°C.