FIELD: electrical engineering.
SUBSTANCE: invention relates to the field of electrical engineering, namely to a sealed battery pack including a layered electrode assembly with a structure, where a number of sheets of positive and negative electrodes are laminated alternately. In the battery pack, the positive electrode discharge current and the negative electrode current-carrying part are connected respectively with a part of the open part of the positive electrode current lead and part of the open part of the current lead of the negative electrode of the layered electrode block. Connection part between the positive electrode current-withdrawing part and the open side of the positive electrode and a connection part between the negative current removing part of the negative electrodes and the open part of the negative electrode current lead is formed at positions, where the total length in the direction of the short side of each of the open parts of the current lead of the positive electrode and the negative electrode is taken as L, distance from the end near the cover in the direction of the short side is less than L / 2.
EFFECT: improving the structural stability and improving the performance of high-speed charge and discharge of the battery are the technical result of the invention.
4 cl, 10 dwg
