Abstract: A multi-tab battery and an electronic device are provided. The multi-tab battery includes a housing and a battery cell. The battery cell is arranged in the housing. The battery cell includes a separator, a positive electrode sheet, a negative electrode sheet, a plurality of positive electrode tabs and a plurality of negative electrode tabs. The plurality of positive electrode tabs are arranged at intervals along a first direction and protrude from the positive electrode sheet by a first length in an extension direction of the battery cell, and the plurality of negative electrode tabs are arranged at intervals along a second direction and protrude from the negative electrode sheet by a second length in the extension direction of the battery cell.

Abstract: A method includes: detecting initial capacities of multiple to-be-grouped battery cells, and grouping, among the to-be-grouped battery cells, battery cells to obtain a first battery pack; detecting an initial SOC of each battery cell in the first battery pack, and grouping the battery cells in the first battery pack to obtain a second battery pack; simulating a charging and discharging process of the second battery pack to obtain charging data and discharging data corresponding to the battery cell; and determining a grouping efficiency of the second battery pack based on the charging data, the discharging data, and a nominal capacity.

Abstract: Disclosed is a method for forming a tube with high internal pressure and low external pressure. The method comprises: putting a tube to be formed into a cavity, such that a bulging area (15) is formed between the tube to be formed and an inner wall of the cavity; continuously injecting a low-pressure fluid into the bulging area, and then injecting a high-pressure fluid into the interior of the tube to be formed, the high-pressure fluid creating a pressure on an outer wall of the tube to be formed such that the tube to be formed starts to expand to the bulging area; stopping the supply of the low-pressure fluid when the tube is bulged to conform to the inner wall of the cavity; and taking the formed tube out to complete a working cycle. Further disclosed is a forming machine for forming a tube according to the above method.

Abstract: Disclosed is a method for forming a tube with high internal pressure and low external pressure. The method comprises: putting a tube to be formed into a cavity, such that a bulging area (15) is formed between the tube to be formed and an inner wall of the cavity; continuously injecting a low-pressure fluid into the bulging area, and then injecting a high-pressure fluid into the interior of the tube to be formed, the high-pressure fluid creating a pressure on an outer wall of the tube to be formed such that the tube to be formed starts to expand to the bulging area; stopping the supply of the low-pressure fluid when the tube is bulged to conform to the inner wall of the cavity; and taking the formed tube out to complete a working cycle. Further disclosed is a forming machine for forming a tube according to the above method.