An electrochemical apparatus includes an electrode assembly, a packaging film, and a first tab, where the first tab is electrically connected to the electrode assembly, the packaging film includes a first packaging film and a second packaging film which are located at two sides of the first tab, the first packaging film includes a first sealing zone, the second packaging film includes a second sealing zone, and the first sealing zone and the second sealing zone are bonded to seal the electrode assembly. The first sealing zone includes a first region and a second region, the first region covers a projection of the first tab on the first sealing zone, the second region connects to the first region, and a width of the second region is less than that of the first region.

An electrochemical apparatus includes an electrode assembly, a packaging film, and a first tab, where the first tab is electrically connected to the electrode assembly, the packaging film includes a first packaging film and a second packaging film which are located at two sides of the first tab, the first packaging film includes a first sealing zone, the second packaging film includes a second sealing zone, and the first sealing zone and the second sealing zone are bonded to seal the electrode assembly. The first sealing zone includes a first region and a second region, the first region covers a projection of the first tab on the first sealing zone, the second region connects to the first region, and a width of the second region is less than that of the first region.

The terminal component disclosed herein is a terminal component for use in a terminal for secondary batteries. The terminal component includes a first metal and a second metal having a recess. The first metal includes a shall having a pair of flat surfaces and a fitting portion formed at one end of the shaft in the major axis direction. At the boundary between the first metal and the second metal, a joining portion joined by ultrasonic, joining and a crimping portion where the fitting portion of the first metal is fitted into the recess of the second metal are formed. A gap is formed between the recess and the fitting portion in the facing direction in which the gap faces the flat surfaces in plan view.

This application provides a battery cell, a method and system for manufacturing same, a battery, and an electrical device. The battery cell includes: an electrode assembly; a shell assembly, configured to accommodate the electrode assembly and including a first side plate and a second side plate, where the first side plate and the second side plate are located on two sides of the electrode assembly along a first direction respectively; a pressure relief mechanism, disposed on the first side plate; and a support member, disposed between the electrode assembly and the first side plate, and configured to support the electrode assembly. A duct is provided on the support member. The duct is configured to guide gas between the second side plate and the support member into the pressure relief mechanism, so that the pressure relief mechanism is actuated to release a pressure when the pressure reaches a threshold.

This application provides a battery cell, a method and system for manufacturing same, a battery, and an electrical device. The battery cell includes: an electrode assembly; a shell assembly, configured to accommodate the electrode assembly and including a first side plate and a second side plate, where the first side plate and the second side plate are located on two sides of the electrode assembly along a first direction respectively; a pressure relief mechanism, disposed on the first side plate; and a support member, disposed between the electrode assembly and the first side plate, and configured to support the electrode assembly. A duct is provided on the support member. The duct is configured to guide gas between the second side plate and the support member into the pressure relief mechanism, so that the pressure relief mechanism is actuated to release a pressure when the pressure reaches a threshold.

An electricity-storage module includes an electrode stacked body and a sealing body. A negative terminal electrode is disposed at one end of the electrode stacked body in a stacking direction such that a second surface is an inner side of the electrode stacked body. The sealing body includes first resin portions 21 which are joined to edge portions, and a second resin portion that is joined to the first resin portions 21 so as to surround the first resin portions from an outer side.

Provided is a rectangular secondary battery with improved rigidity against vibrations and impacts. A rectangular secondary battery of the present invention includes: a flat-shaped electrode group; a current-collecting plate electrically connected to the electrode group; a battery case accommodating the current-collecting plate and the electrode group; a battery cover that closes an opening of the battery case; an electrode terminal penetrating through the battery cover, the electrode terminal being connected to the current-collecting plate via a connecting member; and a gasket that is inserted between the electrode terminal and the battery cover for insulating and sealing. An insulator is disposed between the current-collecting plate and the battery cover, the battery cover includes a battery cover side fixing part that fixes the insulator, and the insulator includes a current-collecting plate side fixing part that fixes the current-collecting plate.

Embodiments described herein relate generally to systems and methods for improving safety features in electrochemical cells. In particular, the systems and methods as described herein can solve safety issues concerning gas generation in electrochemical cells.

An electricity storage device member is provided. The electricity storage device member includes a base material mainly composed of a metal and a resin layer stacked on the base material, in which the resin layer contains a crosslinked fluororesin.

A secondary battery includes an outer package member, an electrode terminal, and a battery device. The outer package member has a flat and columnar shape and includes a first bottom part and a second bottom part opposed to each other. The electrode terminal is supported by the first bottom part and is insulated from the first bottom part. The battery device is contained inside the outer package member and includes a first electrode and a second electrode. The first bottom part has a recess around the electrode terminal.