A method for forming a connection such as an electrical connection, to a fibre material electrode element comprises moving a length of the fibre material relative to a pressure injection stage and pressure impregnating by a series of pressure injection pulses a lug material into a lug zone part of the fibre material to surround and/or penetrate fibres of the fibre material and form a lug strip in the lug zone. The fibre material may be a carbon fibre material and the lug material a metal such as Pb or a Pb alloy. Apparatus for forming an electrical connection to a fibre material electrode element is also disclosed.

The invention relates to an accumulator having a plurality of electrode plates which are adjacently arranged and form at least one electrode plate stack in the form of a block, wherein each electrode plate comprises a frame having a grid arranged therein and wherein at least the grid is filled with an active mass, and wherein each electrode plate comprises at least one connecting lug protruding beyond the frame, wherein the connecting lugs of same-polarity electrode plates are arranged adjacent to one another in a row, wherein the connecting lugs adjacently arranged in a row are materially bonded together electrically and mechanically into a connecting lug block by at least one weld or solder point arranged between the connecting lugs. The invention furthermore relates to a method for manufacturing an accumulator.

The invention relates to an accumulator having a plurality of electrode plates which are adjacently arranged and form at least one electrode plate stack in the form of a block, wherein each electrode plate comprises a frame having a grid arranged therein and wherein at least the grid is filled with an active mass, and wherein each electrode plate comprises at least one connecting lug protruding beyond the frame, wherein the connecting lugs of same-polarity electrode plates are arranged adjacent to one another in a row, wherein the connecting lugs adjacently arranged in a row are materially bonded together electrically and mechanically into a connecting lug block by at least one weld or solder point arranged between the connecting lugs. The invention furthermore relates to a method for manufacturing an accumulator.

Welding electrode arrangement and method for welding one interconnector of two adjacent electrochemical cells of a rechargeable battery. The two electrochemical cells are disposed to be separated by means of a housing partition. The interconnectors are disposed to face one another on two opposite sides of the housing partition. An opening is disposed in a region of the housing partition. The method comprises contacting the interconnectors with a welding electrode arrangement. The welding electrode arrangement has at least one pair of welding electrodes. One welding electrode of the at least one pair of welding electrodes contacts in each case one of the interconnectors by means of an insert part. The method further comprises welding the interconnectors in such a manner that the material of the interconnectors melts at least in regions and is connected in a materially bonded manner through the opening in the housing partition.

Provided is a lead-acid battery where a positive electrode shelf and a negative electrode shelf are electrically connected to each other through a penetrating connection body including a welded portion filled in a penetration hole in a partition wall. A distance A between upper end surfaces of the positive and negative electrode shelves and a lower end portion of the penetration hole is 3-5 mm, a distance B between an upper end portion of the penetration hole and an upper end portion of the penetrating connection body is 3-5 mm, a distance C between the upper end portion of the penetrating connection body and a level of the electrolyte solution is 0 mm or more, and a height of the positive and negative electrode grid portions is 100 mm or more.

Battery parts, such as battery terminals, and associated systems and methods for making the same are disclosed herein. In some embodiments, a battery part includes a body having a base portion and a lug portion extending from the base portion. The battery part can further include a light-curable sealing material at least partially covering an exterior surface of the base portion. The sealing material is configured to seal an interface between the battery part and the material of a battery container when the base portion is embedded in the battery container material.

This invention is a method for making a bipolar plate by selecting at least one resin from the group consisting of acrylonitrile butadiene styrene (ABS), polyphenylsulfone, a polymer resistant to sulfuric acid, and combinations of any thereof. The method may include adding conductive fibers in an amount of from about 20% to about 50% by volume, to the bipolar plate.

This invention is a method for making a bipolar plate by selecting at least one resin from the group consisting of acrylonitrile butadiene styrene (ABS), polyphenylsulfone, a polymer resistant to sulfuric acid, and combinations of any thereof. The method may include adding conductive fibers in an amount of from about 20% to about 50% by volume, to the bipolar plate.

A short-circuit prevention member has electrical insulation and is attachable to and detachable from at least one of the positive electrode connecting member and the negative electrode connecting member, and in a state in which the short-circuit prevention member is mounted on the positive electrode connecting member and/or the negative electrode connecting member, the short-circuit prevention member covers at least one end portion of the positive electrode connecting member and/or the negative electrode connecting member in an extending direction and the tab of the positive electrode and/or the tab of the negative electrode located closest to the end portion.

A bipolar plate can include at least one resin selected from the group consisting of acrylonitrile butadiene styrene (ABS), polyphenylsulfone, a polymer resistant to sulfuric acid, and combinations of any thereof. The bipolar plate can further include conductive fibers comprise amount of from about 20% to about 50% by volume.