1. A system for predicting the thickness of a battery, comprising: a learning data input unit configured to receive a plurality of learning factors on a first battery, wherein the first battery is a previously manufactured battery; an object data input unit configured to receive at least one object factor on a second battery whose thickness is to be predicted; a mechanical learning unit connected to the learning data input unit, wherein the mechanical learning unit is configured to obtain a predicting function based at least in part on the learning factors and to respectively provide a plurality of weight values to the learning factors; and a thickness predicting unit connected to the object data input unit and the mechanical learning unit, wherein the thickness predicting unit is configured to predict the thickness of the second battery based at least in part on the weight values.