| 摘要 |
A non-aqueous cell comprising a rolled electrode assembly including a positive plate with an active layer, a negative plate with an active layer, and a separator between the active layers of the positive and the negative plates; and a case that contains the electrode assembly and a non-aqueous electrolyte. In this cell, a metallic portion disposed in association with the positive plate and having an equipotential to the positive plate is equipped on at least one of the sides thereof with a portion having no active layer, and thus forms a positive plate equipotential exposed metallic portion ( alpha ) extending in a lontitudinal direction for a length at least one turn, and this positive plate equipotential exposed metallic portion ( alpha ) is so arranged as to oppose a negative plate equipotential exposed metallic portion ( beta ) disposed in association with the negative plate, for a length at least one turn. The invention discloses also a non-aqueous cell produced by employing a simple laminate electrode assembly or a zigzag-woven laminate electrode assembly, which has substantially the same structure as the rolled electrode assembly. Due to the unique construction described above, even when the case is crushed by an external pressure or when overcharge is generated due to abnormality in a charger circuit, etc, or when a nail, etc, pierces the cell or when the cell is abnormally heated from outside, an abnormal rise of the cell temperature is limited due to internal short-circuit of the metals having sufficiently low resistance, and the safety of the cell is therefore ensured. |
