This technology involves placing capsules containing solid, liquid, or gaseous defect-inducing agents inside the electrode assembly or within the battery casing. These capsules are designed to open in response to external physical stimuli—such as pressure, temperature, magnetic fields, electromagnetic waves, or X-rays—allowing for the artificial and precise induction and analysis of internal battery defects.
Existing battery defect-inducing devices are limited to observing thermal runaway or require physical damage and deformation of the battery. Consequently, it has been difficult to directly and precisely analyze internal phenomena following the occurrence of a defect.
This technology utilizes capsules that open upon physical stimulation, placed in perforations within the electrode assembly or in spare space inside the battery casing. By releasing various defect-inducing agents—such as degradation particles, high-concentration additives, flame retardants, or gases—at desired times and locations, it enables quantitative analysis of electrochemical behavior and structural changes without deforming the battery. It can be applied to safety certification testing by cell manufacturers, verification of electrolyte additives and fire-extinguishing agents, and battery failure analysis. This allows for the design of reproducible defect scenarios, enabling the identification and mitigation of vulnerabilities from the initial cell design stage.
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