| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve safety of a flat lithium-ion secondary battery. <P>SOLUTION: A shaft core 10 is equipped with first and second conductor members 11 and 12, and a heat-contractable insulator 13 that is interposed between the conductor members to insulate the conductor members. Respective conductor members are respectively connected to a negative electrode plate and a positive electrode plate, and at a time of abnormal heat generation of the battery, the insulator is heat-contracted and both conductor members become contacted. By this, the negative electrode plate and the positive electrode plate are short-circuited via the shaft core, so that potential difference between the negative electrode plate and the positive electrode plate is eliminated, and the heat generation stops. When the abnormal heat generation occurs, by the heat contraction of the insulating material, a contact face is formed between the conductor members so that both become contactable, while at the time of high temperature, plasticity is elevated in the insulator, and furthermore, is fused. At this time, by tightening force of the separator, conductor members become approachable, and a gap is narrowed so that the conductor members are brought into contact. <P>COPYRIGHT: (C)2011,JPO&INPIT |
