The invention discloses a battery charging control device and a battery balance charging controller, which are used for achieving the balance charge of the battery. The battery balance charging controller comprises a battery reference voltage generation unit, a voltage balance unit and a balance judging unit; and whether a battery voltage difference of two adjacent battery units in a battery module is excessively large can be judged by using a reference voltage provided by the battery voltage generation unit. Meanwhile, the battery charging control device can also detect the voltage and the charging current of a battery module so as to judge the time for balancing the battery voltage. Then the voltage balance unit can be controlled by the balance judging unit, so that the charging current of the battery unit with lower voltage is heavier than that of the battery unit with higher voltage and the battery voltage difference of various battery units is reduced.