In addition to responding to safety problems with design margin and system safety factor, a solution that meets market needs (high energy density) is necessary.

Purpose / Background

As the number of products using lithium-ion rechargeable batteries increases, material safety decreases and internal short-circuit safety trouble with aging increases due to secondary deterioration.

Proposal from KRI / Future development / Expected results, etc.

〔Safety mechanism (trigger) analysis〕

• 〔Development issues that needs to be emphasized〕
• ●Analysis of heating mechanism, understanding of main cause, investigation of deterrence

• ・Material development (improvement of Li absorption, improvement of stability during overcharge), electrode / battery design (heat capacity, heat dissipation)
• ・Sensing ⇒ Avoiding safety trouble by control

• ●Short circuit due to contamination, internal short circuit tolerance due to crush accident (separator, electrode, battery design)
• ●Actual use environment at battery development and adoption, verification of safety assuming aged deterioration