A method and apparatus for drawing back of spent batteries

摘要

A device for recuperating used batteries has a receiving compartment (1) comprising a left sub-compartment (1a) with a baseplate (7) with inset contacts for receiving cylindrical batteries and a right sub-compartment (1b) for receiving right parallelepipedal batteries. In order to check whether an inserted object is a battery, the receiving compartment (1) is closed by a slide (not shown) and locked by a bolt (10), and a mounting (15) is lowered until contact points on a pair of stamps (20a, 20b or 21a, 21b) or a stamp (22a, 22b or 22c) on the mounting touch one of the contacts inset into the base plate (7) of the receiving compartment (1). A test is then carried out to ascertain whether a voltage of at least 20 mV exists between the contact points. If not, the object is subjected to a surge lasting approximately 1 second and a maximum voltage, usually 14 V, and the voltage test is repeated. The base plate (7) is then retracted and, if the results of two voltage tests are negative, the object falls into a return chute, otherwise it falls into a collecting container. The slide is then unlocked.