ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERY SYSTEM AND CHARGING DEVICE FOR ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERIES

[Problem] To provide a means for detecting the generation of electrodeposition of metal lithium in an all-solid-state lithium-ion secondary battery in a real-time manner even when charging the battery without depending on the specifications of the battery.[Solution] To measure alternate current impedance of an all-solid-state lithium-ion secondary battery when charging the battery, and to judge whether electrodeposition of metal lithium has generated in a solidelectrolyte layer forming the battery based on the relationship between the amplitude of the response signal at discharge direction of the impedance and the amplitude of the response signal at charge direction of the impedance.