Vehicle power supply unit

Abstract

A vehicle power supply unit is provided, which includes a part made of degradable plastic, which may be a battery case of a secondary battery, and may be a separator of a fuel cell when the degradable plastic is made conductive. A condition in which the degradable plastic is decomposed is different from a condition in which it is actually used in a vehicle.

1 . A vehicle power supply unit including a plastic part, wherein the plastic part is a battery case of a secondary battery and the vehicle power supply unit is a fuel cell; 
 the part comprises a degradable plastic which is decomposable by light or by microorganism and an electrical conductivity imparting agent, wherein the electrical conductivity imparting agent comprises 20 percent or less of a weight of the part.    
   
   
       2 . The vehicle power supply unit according to  claim 1 , wherein the vehicle power supply unit is covered by or contained in a power supply unit case.