Core Insights - The article discusses the advancements in the battery calorimeter technology by Yangyi Technology, highlighting the launch of several models including BAC-420A, BAC-800B, and BAC-1000A, with significant innovations in the BAC-800B and BAC-1000A models [1][2] Product Development - Yangyi Technology has continuously upgraded its battery calorimeter lineup since the introduction of the BAC-420A in 2018, leading to the development of various models tailored for different testing needs [1] - The BAC-800B and BAC-1000A models incorporate customer feedback and address new challenges in lithium battery thermal runaway testing, featuring a pressure vessel that complies with national standards [2] Experimental Setup - The experiments utilized two 500Ah lithium iron phosphate batteries tested with both BAC-800B and BAC-420A calorimeters to ensure data comparability, with BAC-800B conducting simultaneous gas emission tests [3] Testing Results - The results from the tests indicated that the BAC-800B calorimeter provided more comprehensive data on thermal runaway, including parameters such as onset temperature, maximum temperature, and gas emission rates, compared to the BAC-420A [8] - Key parameters from the tests showed that the BAC-800B had a lower self-heating onset temperature (116.63°C) compared to BAC-420A (120.58°C), and a significantly higher maximum temperature (442.5°C vs. 541.18°C) [8] Conclusion - The experimental results confirm that Yangyi Technology's calorimeters maintain data consistency across different models, ensuring accurate and reliable testing outcomes despite variations in chamber size and technical design [9]