| 摘要 |
PROBLEM TO BE SOLVED: To nondestructively determine lithium ion concentration in an electrolyte.SOLUTION: A lithium ion secondary battery system includes a lithium ion secondary battery, a potential measurement part, a voltage application part, a current measurement part and a switching part. The lithium ion secondary battery includes a positive electrode reference electrode, a negative electrode reference electrode, a positive electrode and a negative electrode. A current is measured by the current measurement part when a voltage is applied between the positive electrode reference electrode and the negative electrode reference electrode by the voltage application part, during the positive electrode reference electrode and the negative electrode reference electrode are connected by the switching part. Each potential of the positive electrode and the negative electrode is measured by the potential measurement part, while the positive electrode reference electrode and the positive electrode as well as the negative electrode reference electrode and the negative electrode are connected by the switching part. |
