A seal assembly for a battery cell includes a grommet having an opening having an inner surface. A nail has a nail head and a stem extending from the stem. The stem includes a first portion with a larger diameter and a second portion with a smaller diameter and the stem extends through the opening in the grommet. The stem and the grommet form a first interference fit at a distal end of the opening. A trap clearance is formed between the distal end of the opening and the nail head. The trap clearance defines a trap for a sealant. A sealant is disposed on the stem and is located at least partially in the trap.

A battery cell includes an electrode assembly, a housing, and an electrode terminal. The electrode assembly includes a tab. The housing is configured to accommodate the electrode assembly. The electrode terminal is disposed in the housing and electrically connected to the tab. The electrode terminal is provided with a through hole, where the through hole is configured for injecting an electrolyte into an inner space of the housing.

Embodiments of this application provide a battery cell, a battery, and an electric apparatus. The battery cell may include an electrode assembly, a housing, an electrode terminal, and a current collector. The electrode assembly may include a first tab. The housing may be configured to accommodate the electrode assembly. The electrode terminal may be disposed in the housing, and the electrode terminal may include a first concave portion and a connecting portion at the bottom of the first concave portion. The current collector may be connected to the first tab and welded to the connecting portion.

An electrical device includes: a housing part made of a metal and including a feedthrough therethrough, an opening of the feedthrough, a first region, and a second region, the opening receiving a conductive material or a conductor in a glass material or a glass-ceramic material, wherein: (i) the conductive material has a first coefficient of expansion α.sub.1, the glass material or the glass-ceramic material has a second coefficient of expansion α.sub.2, and the housing part has a third coefficient of expansion α.sub.3, the third coefficient of expansion α.sub.3 being always greater than the second coefficient of expansion α.sub.2; or (ii) the first region including a width W that is substantially perpendicular to the axis of the at least one opening, the width W of the first region being always greater than a thickness D.sub.2 and a thickness D.sub.E of the second region; or (iii) a combination of (i) and (ii).

A battery includes a battery case including a housing having side walls defining a first open end and a second open end, the battery case including a separate top cover to cover the first open end of the housing and a separate bottom cover to cover the second open end of the housing; a first electrode located within the case; a second electrode located within the case; a first terminal coupled to the first electrode and exposed outside the case; and a second terminal coupled to the second electrode and exposed outside the case.

A cell includes an electrode assembly, a pin assembly, and a cell house. The electrode assembly includes a central hole, at least one positive electrode, at least one negative electrode, and at least one diaphragm separating the at least one positive electrode from the at least one negative electrode. The at least one positive electrode, the at least one negative electrode and the at least one diaphragm are disposed around the central hole in a spiral winding manner. The pin assembly is disposed in the central hole for polarity separation. The pin assembly includes a housing including an axial through hole; the housing is partially or fully disposed in the central hole. The pin assembly further includes an insulating part for separating the polarity of the cell and at least one electrode lead. The cell house is hermetically connected to the housing.

The present application relates to a top cap assembly, a secondary battery, a battery module, and a device. The top cap assembly includes a top cap plate, having electrode lead-out hole; an electrode terminal, arranged at the top cap plate and covering the electrode lead-out hole; a current collecting member, in which the current collecting member includes a convex portion having an accommodating cavity, at least part of the convex portion is arranged in the electrode lead-out hole, and welded and connected to the electrode terminal to form a welding portion facing the accommodating cavity, and the current collecting member has a connecting hole; an insulating protection member, in which the insulating protection member is arranged at a side of the current collecting member away from the electrode terminal, and the insulating protection member includes a shielding portion and a connecting portion connected with the shielding portion.

The present application discloses an insulating sheet of a cylindrical battery, including an insulating sheet body. A tab through hole or a tab notch is formed in the insulating sheet body, the tab through hole or the tab notch is arranged to be eccentric. The insulating sheet of the cylindrical battery further includes a blind hole or a through hole formed in a middle portion of the insulating sheet body, and further includes a metal sheet. The metal sheet covers on an opening at an end of the blind hole or the through hole and/or is arranged in the blind hole or the through hole. A surface of the metal sheet protrudes or is flush with the opening of the blind hole or the through hole, and a thickness of the metal sheet in the through hole is smaller than a depth of the through hole.

The embodiments of the present disclosure provide a secondary battery, a battery module, a battery pack, a device, and a manufacturing method. The secondary battery includes: an electrode unit, including a main body portion and a first tab and a second tab extending out from the main body portion; a casing, including an accommodating cavity for accommodating the main body portion and a first opening which is in communication with the accommodating cavity; a first cover plate capping the first opening, the first cover plate including a first relief hole penetrating therethrough, the first tab passes through the first relief hole and is connected to a side of the first cover plate facing away from the accommodating cavity; and a sealing plate, which is sealingly connected to the side of the first cover plate facing away from the accommodating cavity and covers the first relief hole.

Provided are a lithium primary battery in which a structure of an electrode closely related to output characteristics of the battery is improved to expand a reaction area, thus improving the output characteristics of the battery, and a method for manufacturing the lithium primary battery.