Lithium ion batteries (LIBs) are efficient, high-density electrical energy storage devices utilized in a perpetually increasing range of applications. One of the weaknesses of LIBs is that a small deviation from the normal operating conditions may cause an irreversible failure accompanied by a rapid self-heating and ejection of combustible gases and aerosols. The information on how much energy is released upon failure is critical for design of energy storage systems. In the current study, a novel technique, Copper Slug Battery Calorimetry (CSBC), was combined with oxygen consumption calorimetry to measure the rate of heat generated inside an LIB cell (P_IHG) and the rate of heat generated as a result of combustion of ejected battery materials (P_Flaming). A short duct equipped with a perforated plate was added to the original design of the CSBC apparatus to collect gases and aerosols ejected from the cell, reduce their flow speed and deliver them to a hot-wire igniter, which was used to initiate a diffusion flame. The exhaust from this flame was collected to measure the oxygen consumed in the combustion process and compute P_Flaming. This approach to handling the ejected materials increased their combustion efficiency and eliminated thermal feedback from the flame to the cell, which enabled simultaneous measurement of P_IHG and P_Flaming. The new setup was employed to investigate thermally induced failure of an 1880 mA h prismatic LIB at various states of charge (SOC). It was determined that, at 100% SOC, this LIB released 33 ± 1.0 kJ of energy into the body of the cell and 113 ± 19 kJ was produced as a result of combustion of the ejected battery materials. The latter value is significantly greater than those previously reported for similarly sized cells, which can be explained by a more complete combustion achieved in this new apparatus.

锂离子电池（LIB）是高效，高密度的电能存储设备，可在不断增加的应用范围中使用。LIB的弱点之一是，与正常运行条件的微小偏差可能会导致不可逆转的故障，并伴随着快速的自热以及可燃气体和气溶胶的喷射。故障时释放多少能量的信息对于能量存储系统的设计至关重要。在当前的研究中，将一种新型技术铜Sl电池量热法（CSBC）与耗氧量热法相结合，以测量LIB电池内部产生的热量（P _IHG）以及由于燃料的燃烧而产生的热量。弹出的电池材料（P_火焰状）。CSBC设备的原始设计中增加了一条带穿孔板的短管，以收集从电池中喷出的气体和气溶胶，降低它们的流速并将其输送到热线点火器，该点火器用于引发扩散火焰。收集来自该火焰的废气，以测量燃烧过程中消耗的氧气并计算P _Flaming。这种处理喷射物料的方法提高了燃烧效率，并消除了从火焰到电池的热反馈，从而可以同时测量P _IHG和P _Flaming。新的设置用于研究在各种电荷状态（SOC）下1880 mA h棱柱形LIB的热致故障。可以确定的是，在100％SOC下，该LIB将33±1.0 kJ的能量释放到电池主体中，并且由于排出的电池材料燃烧而产生113±19 kJ的能量。后者的值明显大于先前报道的类似尺寸电池的值，这可以通过在这种新设备中实现更完全的燃烧来解释。