The aim of the invention is to provide an electrochemical cell that can be produced as simply as possible and has a long service life. This is achieved in that the electrochemical cell comprises a first contact element that connects a first cell terminal to a first connection conductor and that is fixed to a cover element of the electrochemical cell by means of a first potting element in a first connection region, said first potting element being made of a first polymer material that comprises or is made of a first resin material, and/or the electrochemical cell comprises a second contact element that connects a second cell terminal to a second connection conductor and that is fixed to the cover element by means of a second potting element in a second connection region, said second potting element being made of a second polymer material that comprises or is made of a second resin material.

A method of manufacturing a secondary battery that includes combining a first metal casing and a second metal casing with each other without being crimped so as to house an electrode assembly between the first metal casing and the second metal casing. Also disclosed is a secondary battery that includes: an electrode assembly; a first metal casing; and a second metal casing, wherein the first metal casing and the second metal casing are combined with each other without being crimped so as to house the electrode assembly between the first metal casing and the second metal casing.

A method of manufacturing a secondary battery that includes combining a first metal casing and a second metal casing with each other without being crimped so as to house an electrode assembly between the first metal casing and the second metal casing. Also disclosed is a secondary battery that includes: an electrode assembly; a first metal casing; and a second metal casing, wherein the first metal casing and the second metal casing are combined with each other without being crimped so as to house the electrode assembly between the first metal casing and the second metal casing.

One variation of a battery unit includes: a series of anode collectors; a set of anode electrodes including anode material arranged on both side of the anode collectors; a set of anode interconnects interposed between and electrically coupling adjacent anode collectors and folded to locate the anode collectors in a boustrophedonic anode stack; a series of cathode collectors; a set of cathode electrodes including cathode material arranged on both side of the cathode collectors; a set of cathode interconnects interposed between and electrically coupling adjacent cathode collectors and folded to locate the cathode collectors in a boustrophedonic cathode stack with cathode collectors interdigitated between anode collectors in the boustrophedonic anode stack; and a set of separators arranged between the anode and cathode electrodes and transporting solvated ions between the anode and cathode electrodes.

Energy storage devices, battery cells, and batteries of the present technology may include a housing characterized by a first end and a second end opposite the first end. The housing may include a circumferential indentation proximate the first end. The housing may define a first interior region between the first end and the circumferential indentation, and the housing may define a second interior region between the circumferential indentation and the second end. The batteries may include a set of electrodes located within the housing. The set of electrodes may be positioned within the second interior region of the housing. The batteries may include a cap at least partially contained within the first interior region of the housing. The batteries may also include a first insulator positioned within the housing. The first insulator may extend across the circumferential indentation from the cap to the set of electrodes.

Energy storage devices, battery cells, and batteries of the present technology may include a housing characterized by a first end and a second end opposite the first end. The housing may include a circumferential indentation proximate the first end. The housing may define a first interior region between the first end and the circumferential indentation, and the housing may define a second interior region between the circumferential indentation and the second end. The batteries may include a set of electrodes located within the housing. The set of electrodes may be positioned within the second interior region of the housing. The batteries may include a cap at least partially contained within the first interior region of the housing. The batteries may also include a first insulator positioned within the housing. The first insulator may extend across the circumferential indentation from the cap to the set of electrodes.

A battery includes a housing and a battery cell accommodated in the housing. The battery further includes an insulator accommodated in the housing, where the insulator is located between the housing and the battery cell and is provided with a through hole having a size greater than 100 μm and less than or equal to 2000 μm.

A battery includes a housing and a battery cell accommodated in the housing. The battery further includes an insulator accommodated in the housing, where the insulator is located between the housing and the battery cell and is provided with a through hole having a size greater than 100 μm and less than or equal to 2000 μm.

A sealed battery as an example of an embodiment is provided with an electrode body to which an electrode tab is connected, a closed-end cylindrical exterior housing can which houses the electrode body, and a sealing body that seals an opening of the exterior housing can. The sealing body includes a rupture disk. The rupture disk has a curved first thin-walled portion and a first valve portion surrounded by a straight-line portion connecting both ends of the first thin-walled portion. The first valve portion has a protruding section protruding toward the electrode body, the electrode tab is joined to a side surface of the protruding section, and at least a part of a joint surface between the electrode tab and the protruding section is disposed on a plane crossing the straight-line portion.

A sealed battery as an example of an embodiment is provided with an electrode body to which an electrode tab is connected, a closed-end cylindrical exterior housing can which houses the electrode body, and a sealing body that seals an opening of the exterior housing can. The sealing body includes a rupture disk. The rupture disk has a curved first thin-walled portion and a first valve portion surrounded by a straight-line portion connecting both ends of the first thin-walled portion. The first valve portion has a protruding section protruding toward the electrode body, the electrode tab is joined to a side surface of the protruding section, and at least a part of a joint surface between the electrode tab and the protruding section is disposed on a plane crossing the straight-line portion.