The paper is devoted to the problem of efficient operation of a hybrid capacitive energy storage of power supply for micro resistance welding. Еhe efficiency of battery-supercapacitor modules is considered to optimize the operation of hybrid capacitive energy storage for micro resistance welding equipment. The relevance of the problem is explained by the necessity of simultaneous solving two following tasks. First, a large pulsed current, that is inherent for micro resistance welding, greatly exceeds the average value of battery discharge current and can significantly shorten the battery service life in a charge-discharge cycle. Second, the output voltage increases or decreases dynamically as the supercapacitor is charged or discharged. As a result, the efficiency of power converters, which are connected to a supercapacitor varies significantly by the difference in their input and output voltage levels. Thereby, the goal of this paper is to develop energy control system to achieve efficient using of the hybrid capacitive energy storage and stability of its output voltage for high-peak pulsed load and for portable applications. To achieve the stated goal, first, the new battery-supercapacitor hybrid topology which employs a DC-DC converter is proposed. The authors propose a topology, which provides linear discharge current of battery for the supercapacitor module charging and provides for the voltage equalizing of the module cells by means of a balancing system based on a flyback converter. Secondly, the simulation of the system operation is carried out. The diagrams of voltage and current illustrating the process of supercapacitor module charge from the accumulator battery and the principle of the balancing cells operation were obtained. These diagrams confirm the effectiveness of the proposed topology since the battery is discharged current without pulsed loads. The diagrams also show that the constant level voltage of ultracapacitors module is maintained due to the use of a voltage equalizing system and a charge control unit, which connects or disconnects the battery and the converter depending on the voltage level on the supercapacitor. The proposed topology can be recommended for efficient operation of the hybrid capacitive energy storage for developing power supplies for micro resistance welding, which will use in the conditions of large pulsed load current and limited access to the industrial network.Ref. 10, fig. 3, tabl. 1.