An electrochemical includes an electrode assembly, a packaging bag including a sealing region and a tab extending out of the sealing region. The electrode assembly is accommodated in the packaging bag. The tab includes a conductive piece which is electrically connected to the electrode assembly and a bonding piece which is disposed in the sealing region and located between the conductive piece and the packaging bag. The bonding piece includes an exposed portion extending out of the sealing region. Along a first direction that is approximately perpendicular to an extension direction of the conductive piece, the exposed portion includes a first step surface that is disposed on a surface of the conductive piece, a second step surface located on each of two sides of the first step surface, and a first connecting surface that connects the first step surface and the second step surface forming a first step portion.

An electrochemical includes an electrode assembly, a packaging bag including a sealing region and a tab extending out of the sealing region. The electrode assembly is accommodated in the packaging bag. The tab includes a conductive piece which is electrically connected to the electrode assembly and a bonding piece which is disposed in the sealing region and located between the conductive piece and the packaging bag. The bonding piece includes an exposed portion extending out of the sealing region. Along a first direction that is approximately perpendicular to an extension direction of the conductive piece, the exposed portion includes a first step surface that is disposed on a surface of the conductive piece, a second step surface located on each of two sides of the first step surface, and a first connecting surface that connects the first step surface and the second step surface forming a first step portion.

A battery is provided in which a damage of the electrode tab group is suitably inhibited. Suitable one aspect of the battery herein disclosed is provided with a battery comprising an electrode body with a positive electrode and a negative electrode, and that is formed in a flat hexahedron shape having a pair of rectangular-shaped flat outer surfaces, and includes a battery case that accommodates them. Here, a fixing member is arranged from at least one flat outer surface among a pair of flat outer surfaces to a positive electrode electrical collector part or a negative electrode electrical collector part of the electrode body.

A battery is provided in which a damage of the electrode tab group is suitably inhibited. Suitable one aspect of the battery herein disclosed is provided with a battery comprising an electrode body with a positive electrode and a negative electrode, and that is formed in a flat hexahedron shape having a pair of rectangular-shaped flat outer surfaces, and includes a battery case that accommodates them. Here, a fixing member is arranged from at least one flat outer surface among a pair of flat outer surfaces to a positive electrode electrical collector part or a negative electrode electrical collector part of the electrode body.

A system and method for a thermal management system for a plurality of battery cells.

A system and method for a thermal management system for a plurality of battery cells.

Disclosed is a battery module, which includes a plurality of battery cells stacked on each other, and a plurality of adhesive sheets respectively provided between the plurality of battery cells and configured to generate an adhesion force after the plurality of battery cells are aligned.

Disclosed herein is a method for manufacturing an electrode assembly. The method may include a step of applying an electrode active material to at least a portion of an electrode collector, which is formed by sequentially stacking a first electrode foil, an electrode insulating layer, and a second electrode foil, to manufacture an electrode, a step of stacking the electrode and a separator, and a step of connecting an electrode lead to a non-coating portion that is not coated with the electrode active material on the electrode collector. The step of connecting the electrode lead may include passing a coupling part through the electrode collector and the electrode lead to connect the electrode collector to the electrode lead.

Disclosed herein is a method for manufacturing an electrode assembly. The method may include a step of applying an electrode active material to at least a portion of an electrode collector, which is formed by sequentially stacking a first electrode foil, an electrode insulating layer, and a second electrode foil, to manufacture an electrode, a step of stacking the electrode and a separator, and a step of connecting an electrode lead to a non-coating portion that is not coated with the electrode active material on the electrode collector. The step of connecting the electrode lead may include passing a coupling part through the electrode collector and the electrode lead to connect the electrode collector to the electrode lead.

A method for manufacturing an electrode assembly according to an embodiment of the present invention may include applying a positive electrode active material to at least a portion of a positive electrode collector, applying a negative electrode active material to at least a portion of a negative electrode collector, The method may include interposing a separator between a positive electrode and a negative electrode, and respectively removing a positive electrode insulating layer and a negative electrode insulating layer from at least partial areas of a positive electrode tab, which is not coated with the positive electrode active material, and an negative electrode tab, which is not coated with the negative electrode active material in the negative electrode collector. The method may include connecting a positive electrode lead and a negative electrode lead to the positive electrode tab and the negative electrode tab, respectively.