UL 1642 added a test requirement for solid state cells
UL 1642 added a test requirement for solid state cells,
UL 1642,
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Following last month’s addition of heavy impact for pouch cell, this month UL 1642 proposed to add a test requirement for solid state lithium cells.At present, most solid state batteries are based on lithium-sulfur batteries. Lithium-sulfur battery has high specific capacity (1672mAh/g) and energy density (2600Wh/kg), which is 5 times that of traditional lithium-ion battery. Therefore, solid state battery is one of the hot-spot of lithium battery. However, the significant changes in the volume of sulfur cathode during the process of delithium/lithium, the dendrite problem of lithium anode and the lack of conductivity of solid electrolyte have hindered the commercialization of sulfur cathode. So for years, researchers have been working on improving the electrolyte and interface of solid state battery.UL 1642 adds this recommendation with the goal of effectively solving the problems caused by the solid battery (and cell) characteristics and potential risks when in usage. After all, cells containing sulphide electrolytes may release the toxic gas like hydrogen sulphide under some extreme conditions. Therefore, in addition to some routine tests, we also need to measure toxic gas concentration after the tests. Specific test items include: capacity measurement, short circuit, abnormal charge, forced discharge, shock, crush, impact, vibration, heating, temperature cycle, low pressure, combustion jet, and measurement of toxic emissions.The standard GB/T 35590, which covers portable power source, is not included into 3C certification. The main reason may be that GB/T 35590 pays more attention to the performance of the portable power source rather than safety, and the safety requirements are mostly referred to GB 4943.1. While 3C certification is more about ensuring product safety, therefore GB 4943.1 is chosen as the certification standard for portable power source.
