The present disclosure provides a battery charging control method and system, a vehicle, a readable storage medium, and a device. According to the present disclosure, the method comprises: in the charging process, determining an adaptive allowable charging current value according to an acquired current state of a battery; calculating the difference between a bus voltage and a battery voltage according to the difference between the allowable charging current value and a current value obtained by real-time sampling; and controlling the bus voltage according to the difference between the bus voltage and the battery voltage, so as to realize timely-adjusted charging control. The purpose of controlling the charging current is achieved by continuously adjusting a charging voltage; it is guaranteed that the charging current of each cluster of batteries does not exceed the charging current limit; on one hand, the control precision of the charging process is improved, and on the other hand, the charging safety is also improved.