An electrode assembly and a secondary battery having the same are disclosed. In one embodiment, the electrode assembly includes a separator interposed between first and second electrode plates and a first electrode tab electrically connected to the first electrode plate; a second electrode tab electrically connected to the second electrode plate. The electrode assembly may further include an auxiliary tab electrically connected to at least one of the first and second electrode plates, wherein the auxiliary tab is positioned between the first and second electrode tabs.

A power storage device that includes a first adhesive member between a first current collector and a second surface layer, and a second adhesive member between a second current collector and a first surface layer. A first electrolyte retaining layer is provided between the first adhesive member and the first current collector. A second electrolyte retaining layer is provided between the second adhesive member and the second current collector.

A fuse unit attachment structure includes a fuse bracket to be mounted on a fuse unit directly attachable to a battery and a bracket connecting member for connecting the fuse bracket to the battery. The fuse bracket has a unit supporting portion to support the fuse unit so as to be movable in a direction perpendicular to a lateral surface of the battery and a connecting member engaging portion to be engaged with the bracket connecting member so as to be movable in a direction along the lateral surface of the battery.

Disclosed is a battery having a positive terminal and a negative terminal and two electrical connection tongues, each tongue secured to one of the terminals thereof. The battery also includes at least one additional connection tongue secured to one of the terminals thereof, forming a radiating element with the electrical connection tongue secured to the same terminal of the battery.

Provided is an energy storage apparatus which includes: a plurality of energy storage devices which respectively have an external terminal and are arranged in a row in a first direction; an adjacent member disposed between the energy storage devices disposed adjacently to each other in the first direction; and a bus bar which connects the external terminals of the energy storage devices disposed on both sides of the adjacent member to each other. The bus bar includes: a first connecting portion connected to one external terminal; a second connecting portion connected to the other external terminal; and a portion which extends in a projecting manner in a direction away from the adjacent member in a second direction orthogonal to the first direction or a portion which extends in a recessed manner in a direction that the portion approaches the adjacent member in the second direction in a state where the portion is spaced-apart from the adjacent member between the first connecting portion and the second connecting portion.

A rectangular secondary battery includes a current breaking mechanism with improved rigidity against vibration and impact. The current breaking mechanism is interposed in the middle of a current path electrically connected between an external terminal and a wound electrode group to break the current path by the rise of battery internal pressure. The current breaking mechanism includes a connection electrode arranged inside a battery lid and electrically connected to the external terminal, and a conductive plate bonded to the connection electrode and deformed by the rise of the battery internal pressure. The connection electrode includes a tabular member having a through hole in communication with the outside of the battery opening on a planar portion. The conductive plate includes a dome-shaped diaphragm portion gradually reducing its diameter as shifting in an axial direction and a flange portion extending radially outward from an outer peripheral portion of the diaphragm portion.

A battery for use in electronic devices and which is safely ingested into a body and a related method of making the battery. The battery includes an anode, a cathode and a quantum tunneling composite coating. The quantum tunneling composite coating covers at least a portion of at least one of the anode or the cathode and provides pressure sensitive conductive properties to the battery including a compressive stress threshold for conduction. The compressive stress threshold may be greater than a pre-determined applied stress in a digestive tract of the body in order to prevent harm if the battery is ingested. The battery may include a waterproof seal that extends between the quantum tunneling composite coating and a gasket separating the anode and cathode to inhibit the battery from short circuiting in a conductive fluid below the compressive stress threshold.

A bus bar module includes bus bars and block circuits. A voltage detection circuit included in each block circuit detects voltage values of electric storage elements via lines connected to the respective bus bars. The number of the electric storage elements assigned to a first block circuit is an even number equal to or larger than a minimum number and smaller than a maximum number. The number of the electric storage elements assigned to a second block circuit is equal to or larger than the minimum number and smaller than the maximum number. The number of the electric storage elements assigned to each third block circuit is the maximum number.

An energy storage device includes an electrode assembly, a case, a terminal part, and a current collector, wherein the terminal part has: an external terminal having at least a part exposed to outside of the case; a conduction member configured to make the external terminal and the current collector conductive; a decoupling mechanism configured to decouple the conduction member, or hinder a conduction state of the conduction member; and an auxiliary terminal disposed spaced from the external terminal, and having at least a part exposed to the outside of the case, the auxiliary terminal being electrically connected to the current collector.

A battery unit (1) comprising a plurality of electrochemical cells (2), which each have an electrode arrangement (3) comprising a cathode contact-making element (4) and an anode contact-making element (5), and an accommodating device (6) comprising a plurality of accommodating units (7), which are each separated from one another by side walls (8), wherein in each case the electrode arrangement (3) of an electrochemical cell (2) of the battery unit (1) is introduced into the accommodating units (7), and the accommodating units (7) are closed by at least one electrolytic barrier (10), which is connected to the accommodating device (6), in such a way that the closed accommodating units (7) with the electrode arrangements (3) arranged therein form the electrochemical cells (2) of the battery unit (1).