Battery cell, battery cell module and power utilization device

The invention provides a battery cell, a battery cell module and a power utilization device. The battery cell comprises a soft insulation packaging body, an electrode assembly and a cover plate, an accommodating cavity with an opening is defined by the soft insulating packaging body; the electrode assembly is arranged in the accommodating cavity; the cover plate is installed on the opening in a sealed mode. Wherein the side wall of the cover plate is provided with a bulge and/or a groove, and the side wall of the soft insulation packaging body is in fit sealing connection with the surface of the bulge and/or the groove. The battery cell structure can solve the technical problem that the sealing position of the soft packaging insulator and the top cover is prone to sealing failure. 本发明提供一种电芯、电芯模组及用电装置，该电芯包括：软质绝缘封装体、电极组件和盖板。所述软质绝缘封装体围设形成具有开口的容纳腔；所述电极组件设置在所述容纳腔内；所述盖板密封安装在所述开口上；其中，所述盖板的侧壁上设置有凸起和/或凹槽，所述软质绝缘封装体的侧壁与所述凸起和/或所述凹槽的表面贴合密封连接。该电芯结构可以改善软质封装绝缘体与顶盖密封处容易出现密封失效的技术问题。