The present invention relates to a secondary battery and a battery module. The secondary battery includes: a casing including a receiving cavity having an opening; a top cover assembly, and an electrode assembly disposed in the receiving cavity, wherein the electrode assembly includes two end faces disposed opposite to each other in a first direction perpendicular to a depth direction of the receiving cavity, a lug extending from each end face; the lug is a layered structure and has a redundant section near the end face and a connecting section connected to the redundant section; the current collecting member includes a current collecting portion fixedly connected to the connecting section. The lug of the secondary battery of the embodiment of the present invention has the redundant section, which can effectively buffer the movement and reduce the possibility that the lug is torn or broken due to an excessive tensile stress.

Some examples include an electrode for an electrochemical cell including a plate portion and a tab portion. The plate portion includes a plate body, a perimeter body edge, and an inset area recessed into the plate body from the perimeter body edge. The inset area is defined by an inset edge. The tab portion extends from the plate portion. The tab portion includes a tab body and tab body edge. The inset edge extends between the perimeter body edge and the tab body edge.

An electrode assembly includes a cathode electrode plate, an anode electrode plate, and a separator disposed between the cathode electrode plate and the anode electrode plate. At least one of the cathode electrode plate and the anode electrode plate is an electrode plate which includes a current collector and a first conductive connector. The current collector includes an insulating layer having opposite side surfaces, a first conductive layer, a second conductive layer, and two electrode active substance layers. The first conductive layer and the second conductive layer are arranged on opposite side surfaces, and the two electrode active substance layers are coated onto the first conductive layer and the second conductive layer. The first conductive connector electrically connects the first conductive layer and the second conductive layer. The electrode assembly is formed by coiling the cathode electrode plate, the separator, and the anode electrode plate.

The present disclosure includes a battery module having a stack of electrochemical cells that includes terminals, a housing that receives the stack of electrochemical cells, and a bus bar carrier disposed over the stack of electrochemical cells such that bus bars disposed on the bus bar carrier interface with the terminals of the stack of electrochemical cells.

An apparatus (101, 101B, 101C, 101D, 101E), an electrical system (706), a vehicle (701) and a method (800) are disclosed. The apparatus (101) comprises a plurality of battery cells (102), each of the battery cells (102) comprising a layer of positive electrode material (103), a layer of electrolyte material (104) and a layer of negative electrode material (105). The apparatus also comprises a container means for containing battery cells (106, 106B, 106D, 6E) formed of an electrically conductive material and having a plurality of cavities (107). Each of the cavities contains at least a respective one of the battery cells (102), and the container means (106, 106B, 106D, 106E) is in direct contact with at least one of the positive electrode material (103) and the electrolyte material (104) of each battery cell (102) or alternatively at least one of the negative electrode material (105) and the electrolyte material (104) of each battery cell (102).

A feed-through component for a conductor feed-through which passes through a part of a housing, for example a battery housing, is embedded in a glass or glass ceramic material and has at least one conductor, for example an essentially pin-shaped conductor, and a head part. The surface, in particular the cross-sectional surface, of the head part is greater than the surface, in particular the cross-sectional surface, of the conductor, for example of the essentially pin-shaped conductor. The head part is embodied such that is can be joined to an electrode-connecting component, for example an electrode-connecting part, which may be made of copper, a copper alloy CuSiC, an aluminum alloy AlSiC or aluminum, with a mechanically stable and non-detachable connection.

An embodiment of the present invention relates to a secondary battery, wherein a technical problem to be solved is to provide a secondary battery which has low resistance and can output high power without loss of capacity, and can prevent deformation or cracking of an electrode assembly. To this end, the present invention provides a secondary battery comprising: a cylindrical can; an electrode assembly which is received in the cylindrical can and includes multiple first tabs extending in a first direction which is a longitudinal direction of the cylindrical can, and multiple second tabs extending in a second direction opposite to the first direction; a cap assembly for sealing the cylindrical can; a first current collecting structure which electrically connects the multiple first tabs to the cap assembly while being insulated from the cylindrical can; and a second current collecting structure for electrically connecting the multiple second tabs to the cylindrical can.

Provided is a battery module including a battery cell laminate and a cooling pin. The battery cell laminate includes a plurality of battery cells are arranged adjacent to each other, each of the battery cells having a structure in which an electrode assembly is sealed together with an electrolytic solution, within a battery case. The cooling pin is interposed between the battery cells, the cooling pin having a plate-shaped structure and including a plurality of fixing protrusions that are locally inserted into an outer surface of the battery case of the battery cell that faces the cooling pin and fixed in position with respect to the battery cell.

A battery includes an electrode body, a case, a positive electrode external terminal, a negative electrode external terminal, an insulator, and a connection bolt, and at least one external terminal of the positive electrode external terminal and the negative electrode external terminal includes an attachment portion and a plate portion. The connection bolt includes a bar-shaped body portion and a flange portion disposed at one end of the bar-shaped body portion, and is fastened to the plate portion in a state in which at least a portion of a roof portion of the insulator is fitted between the flange portion and the plate portion.

An external connection bus bar holding module includes: a first external connection bus bar, a second external connection bus bar, a first protector portion that holds a first electrode connection portion of the first external connection bus bar, a second protector portion that is arranged at an interval from the first protector portion and holds the first external connection portion of the first external connection bus bar, and an intermediate protector portion. The intermediate protector portion is located between the first protector portion and the second protector portion and holds an intermediate portion of the first external connection bus bar between the first protector portion and the second protector portion.