Battery cell comprising battery case including accommodation part and electrode lead groove

Abstract

The present invention provides a battery cell clamping device for fixing and clamping one or more battery cells arranged in one direction in a clamping-baking step for the battery cells, comprising: one or more battery cell fixing jigs interposed between the battery cells; a pressure application part for clamping a battery cell array by applying pressure from one surface to a direction of the other surface facing the one surface, on the basis of an arrangement direction of the battery cell array arranged in a state in which the battery cell fixing jigs are interposed therebetween; and a base part having a structure for supporting the battery cell array in the direction of the other surface facing the pressure applied from the pressure application part, in a state in which the battery cellarray is positioned on the upper surface thereof, wherein each of the battery cell fixing jigs has a battery cell depressed part having a structure recessed inward on one surface facing the battery cell such that the battery cell is fixed in an accommodated state.

Description

technical field [0001] The present invention relates to a battery cell having a battery case including a housing portion and an electrode lead groove. Background technique [0002] In recent years, as energy costs due to fossil fuel consumption have increased and concerns over environmental pollution have become more intense, the demand for environmentally friendly alternative energy sources has become an indispensable factor for the future. Therefore, research on technologies for generating electric power such as nuclear energy, solar energy, wind energy, tidal energy, etc. continues, and an electric power storage device for more efficiently utilizing the energy thus generated has also been attracting attention. [0003] In particular, as technologies related to mobile devices continue to develop and demand for them continues to increase, the demand for batteries as energy sources is rapidly increasing. Therefore, various researches are being conducted on batteries that ca...

AI Technical Summary

Problems solved by technology

However, the elongation of the metal sheet varies in each part depending on the shape of the mold, so when the elongation of the metal sheet exceeds the allowable range of elongation, edge cracks may occur

Therefore, the shapes that can be processed by the deep drawing method are limited

[0012] In particular, such a problem may be exacerbated due to the material properties of a pouch-shaped battery case when forming a housing portion having a complex structure corresponding to the shape of a plurality of unit cells.

[0013] In addition, even when the pouch-shaped battery case is subjected to thermal fusion while the insulating film is interposed between the electrode leads, due to the thickness of the electrode leads, a portion remaining unfused may be formed at the position where the electrode leads are located.

[0014] Therefore, the sealing of the battery case may deteriorate at the location of the electrode leads

In addition, in the case where cell swelling occurs due to gas generated by the reaction between the electrodes and the electrolyte, the pressure of the gas may concentrate on the unfused portion formed at the position of the electrode lead, resulting in damage and safety of the battery case decreased sex

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