A lead-acid battery includes an electrode plate assembly, a battery case, a positive electrode strap, a negative electrode strap, a positive electrode post, a negative electrode post, a cover, and an electrolyte solution. A negative electrode bushing provided in the cover and the negative electrode post together constitute a negative electrode terminal. A maximum value of a gap between an outer circumferential surface of the negative electrode post and an inner circumferential surface of the negative electrode bushing in the negative electrode terminal is 0.5 mm or more and 2.5 mm or less. A rib is provided in a lower part of the negative electrode bushing, and a minimum value of a protrusion height of the rib is 1.5 mm or more and 4.0 mm or less. A distance between a surface of the electrolyte solution and a lowermost portion of the negative electrode bushing is 15 mm or less.

The invention relates to a connecting pole (1) for a rechargeable battery (12) having the following features: a) the connecting pole (1) has a connecting section (2), in which a pole terminal can be fastened on the connecting pole (1), b) the connecting pole (1) has a fastening section (3), in which the connecting pole (1) can be fastened in a housing part (5) of the rechargeable battery (12), c) the fastening section (3) has a labyrinth section (4), d) the outer wall (6) of the connecting pole (1) has, in the labyrinth section (4), one or more peripheral projections (7, 8, 10), e) at least two adjacently arranged peripheral projections (70, 71, 72, 73, 80, 81, 82, 83) are flanged in pairs in the mutually facing direction, wherein a recess (11) is formed on each of the peripheral projections (70, 71, 72, 73, 80, 81, 82, 83) with respect to the outer wall (6) of the connecting pole (1) by the flanged region. The invention also relates to a rechargeable battery housing or a part thereof with at least one such connecting pole and to a machine for producing such a connecting pole.

Battery parts having retaining and sealing features and associated assemblies and methods are disclosed herein. In one embodiment, a battery part includes a base portion that is configured to be embedded in battery container material of a corresponding battery container. The battery part and base portion include several torque resisting features and gripping features that resist torsional or twist loads that are applied to the battery part after it has been joined to the battery container. For example, the base portion can include several internal and external torque resisting features and gripping features that are configured to resist twisting or loosening of the battery part with reference to the battery container material, as well as prevent or inhibit fluid leakage from the battery container.

An energy storage device includes an outer case on which an external terminal is mounted; an electrode assembly housed in the outer case; a conductive shaft portion formed using a material different from a material for forming the external terminal, and having a swaged portion connected to the external terminal at one end thereof in an axial direction; a conductive plate portion housed in the outer case, to which the other end of the conductive shaft portion is connected, and the electrode assembly is connected. The external terminal has a plating layer or an alumite treated layer on a surface thereof which is brought into contact with the swaged portion.

A plurality of battery cells each having a positive electrode terminal and a negative electrode terminal; and a bus bar which connects the electrode terminals facing each other in the battery cells adjacently disposed among the plurality of battery cells.

An electrical assembly includes a plate unit disposed on a battery module, at least one electrical equipment loaded on the plate unit, and a pack terminal loaded on the plate unit. The pack terminal includes a terminal bolt configured to be contacted and connected to a connector of an external device; and a nut configured to be fastened to the terminal bolt. The electrical assembly further includes at least one bus bar loaded on the plate unit and configured to electrically connect the pack terminal to a module terminal of the battery module. At a side portion of the plate unit, an insert portion that is open to allow the nut to be inserted therein is formed, and a slot portion is formed to fix the nut inserted through the insert portion at a predetermined position.

A battery includes: a case including a bottom wall, a front wall, aback wall, a left side wall, and a right side wall opposite the left side wall; a lid on the case opposite the bottom wall; at least one first elongated rib on the left side wall and extending outwardly away from the left side wall a first distance; and at least one second elongated rib on the right side wall and extending outwardly away from the right side wall a second distance that is the same as the first distance.

Disclosed is a pole socket for an energy storage system, having a connecting element with a first end region and with a second end region, a connection element which is arranged on the first end region and which is configured to make electrical contact with electrical consumers, and a contacting element which is arranged on the second end region of the connecting element and which is configured to make electrical contact with a pole shaft. The connection element extends in a first direction of extent proceeding from the connecting element, and wherein the contacting element extends in a second direction of extent proceeding from the connecting element. The second direction of extent runs parallel and in the opposite direction with respect to the first direction of extent, such that the contacting element is arranged offset from the connection element.

A housing for an electrical power storage device is described herein. The housing includes a compartment having a base, a first wall extending from the base, and a second wall extending from the base. The housing also includes a first apron portion and a second apron portion to be used as part of a hold-down assembly for holding down the housing. The first apron portion and the second apron portion are positioned on the first wall and the second wall, respectively, between 15% and 85% of a height of the first wail and second wall from the base to a top of the first wall and the second wall.

The present invention provides a secondary battery including: an electrode assembly (‘jelly-roll’) having a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are wound together; a can main body inside of which a hollow having an open side is formed and in which the electrode assembly is accommodated in a shape surrounding the hollow; and a top cover mounted on an open upper end portion of the can main body to seal the can main body, wherein one of a bottom portion of the can main body and the top cover may be formed with a through-hole communicating with the hollow of the can main body, and at least 50% of a total volume of the hollow is filled with a thermally conductive resin, and provides a secondary battery pack including the secondary battery.