In order to solve the problems existing in the traditional battery-powered sensor network that the battery is not available to replace and the energy of nodes is easy to be exhausted

RF energy harvesting technology has been applied to the wireless rechargeable sensor network. Since the workload and harvested energy of sensor nodes in different positions are different

balanced distribution of nodes' energy can effectively improve the survival rate of nodes. Considering the scenario where mobile RF energy transmitter is employed for charging

we design a reasonable balanced routing scheme and charging algorithm under the conditions of known nodes' location information. First

the network area is discretized based on the cellular hexagonal grid where the grids and nodes are stratified respectively. A balanced routing scheme of hierarchical data transmission is proposed. Then we formulate mathematic model with pre-defined energy transmitter's moving path to minimize the variance of the nodes' residual energy in the adjacent two layers and derive the charging time at different charging spots from the inner layer to the outer layer. Simulation results reveal that compared with the existing balanced charging method

our proposed algorithm can significantly improve the balance of node's residual energy and prolong the network lifetime.