CURRENT CUT-OFF DEVICE, AND POWER STORAGE DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To realize a current cut-off device with high reliability.SOLUTION: A current cut-off device 50 comprises a first energization member 30(37), a second energization member 88, an insulation member 94, and a deformation member 80. The first energization member 30 is fixed to a case 18. The second energization member 88 is arranged at a position opposed to the first energization member 30. The insulation member 94 is arranged between the first energization member 30 and the second energization member 88. The deformation member 80 is fixed to the first energization member 30 inside the insulation member 94. The deformation member 80 contacts the second energization member 88 when pressure in the case 18 is not more than a predetermined value, and does not contact the second energization member 88 when the pressure in the case 18 exceeds the predetermined value. A groove 92 is provided on the first energization member 30 on the second energization member 88 side, and a groove 96 is provided on the second energization member 88 on the first energization member 30 side. The insulation member 94 is positioned in the grooves 92, 96.