A liquid absorbing sheet includes a liquid absorbing resin layer that can effectively absorb nonaqueous electrolyte solutions used in nonaqueous electrolyte secondary cells that make nonaqueous electrolyte battery packs (in particular, lithium ion-based no...

A secondary battery 101 of the present invention is comprised such that a heat-sensitive element 133 which varies in resistance value due to change of temperature is not placed on a path through which a charge or discharge current flows into or out of a st...

A heater 13 and a thermistor 14 are connected in parallel, and a main fuse 11 is connected in series with thus formed parallel circuit to form a protective circuit 6. In a secondary battery 5 of the present invention, a charging/discharging current passes ...