A method for producing a battery module for a traction battery of an electrically operable motor vehicle includes providing battery cells, providing a holding device for the battery cells, which has receiving chambers for the battery cells, at least partially coating an outer side of the battery cells and/or an inner side of the receiving chambers with a microencapsulated adhesive, and inserting the battery cells into the receiving chambers, wherein the insertion movement causes a force to be exerted on the microencapsulated adhesive, by way of which force the microencapsulated adhesive is activated and cured to fix the battery cells in the receiving chambers.

A sealed battery includes a battery can with a bottomed cylindrical shape having an opening, an electrode body accommodated in the battery can, and a sealing plate closing the opening of the battery can. The sealing plate has a first main surface facing an outside of the battery can and a second main surface opposite to the first main surface. The first main surface has a first groove therein with an arc shape. The second main surface has a second groove therein with an arc shape disposed to correspond to the first groove. The first groove has a central angle A1 smaller than a central angle A2 of the second groove. The first groove intersects a symmetry axis of the second groove on the second groove when viewed in a normal direction of the first main surface.

A sealed battery includes a battery can with a bottomed cylindrical shape having an opening, an electrode body accommodated in the battery can, and a sealing plate closing the opening of the battery can. The sealing plate has a first main surface facing an outside of the battery can and a second main surface opposite to the first main surface. The first main surface has a first groove therein with an arc shape. The second main surface has a second groove therein with an arc shape disposed to correspond to the first groove. The first groove has a central angle A1 smaller than a central angle A2 of the second groove. The first groove intersects a symmetry axis of the second groove on the second groove when viewed in a normal direction of the first main surface.

The present application relates to the technical field of batteries and discloses a connector for a large cylindrical battery, a battery module, and a battery pack. The connector for the large cylindrical battery is configured for a large cylindrical battery having a positive electrode and a negative electrode on a same side, and includes a plurality of conductive units. Each conductive unit includes a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region provided between the positive-electrode connecting region and the negative-electrode connecting region. Adjacent conductive units are electrically connected to each other via a connection member.

The present application relates to the technical field of batteries and discloses a connector for a large cylindrical battery, a battery module, and a battery pack. The connector for the large cylindrical battery is configured for a large cylindrical battery having a positive electrode and a negative electrode on a same side, and includes a plurality of conductive units. Each conductive unit includes a positive-electrode connecting region, a negative-electrode connecting region, and a first current-limiting region provided between the positive-electrode connecting region and the negative-electrode connecting region. Adjacent conductive units are electrically connected to each other via a connection member.

Provided are an additive represented by Chemical Formula 1, an electrolyte for a lithium secondary battery including same, and a lithium secondary battery. The details of Chemical Formula 1 are as described in the specification.

A secondary battery is provided including an electrode wound body housed in a battery can, with the electrode wound body having a structure including a band-shaped positive electrode and a band-shaped negative electrode laminated and wound with a separator interposed therebetween, where the positive electrode includes a positive electrode active material layer on both sides of a band-shaped positive electrode foil, the negative electrode includes a negative electrode active material layer on both sides of a band-shaped negative electrode foil, the electrode wound body includes a positive electrode tab at a central part of the positive electrode, includes a negative electrode tab on a winding end side of the negative electrode, and includes a foil tab in a flat plate shape on a winding start side of either one or both of the positive electrode and the negative electrode.

A cylindrical secondary battery may have an insulation layer formed in a region in which the top cap and the first gasket are coupled to each other. The insulation layer may include a ceramic material and a binder. The secondary battery is designed so that, when an external electrical conductive object is electrically connected directly to a positive electrode and a negative electrode of the secondary battery, an electrode tab of the secondary battery is broken as quickly as possible.

A cylindrical secondary battery may have an insulation layer formed in a region in which the top cap and the first gasket are coupled to each other. The insulation layer may include a ceramic material and a binder. The secondary battery is designed so that, when an external electrical conductive object is electrically connected directly to a positive electrode and a negative electrode of the secondary battery, an electrode tab of the secondary battery is broken as quickly as possible.

The present invention concerns a fire safety arrangement for a battery. More particularly, but not exclusively, this invention concerns a fire safety arrangement for a metal ion battery, for example a lithium ion battery. A metal ion battery cell comprises a plurality of electrodes and an electrolyte encased within a housing. The housing comprises a safety valve or vent configured to allow gas build up within the housing to vent outside the housing. A fabric band surrounds the housing, such that the fabric band covers the safety valve or vent. This may allow gas to pass through the fabric band, but contain sparks generated by the battery cell within the fabric band.