A battery manufacturing method includes forming a unit cell having a positive electrode that is obtained by a positive electrode active material layer containing an electrolytic solution being disposed on a positive electrode current collector, a negative electrode that is obtained by a negative electrode active material layer containing an electrolytic solution being disposed on a negative electrode current collector, and a separator interposed between the positive electrode and the negative electrode. The battery manufacturing method further includes applying pressure to one unit cell or with two or more stacked unit cells from the stacking direction, and charging the one unit cell or the two or more stacked unit cells after applying of the pressure. The method is performed such that the positive electrode and the negative electrode are formed without an application film being subjected to a drying process performed through heating.

A method for evaluating a consistency of a battery pack is provided, including: obtaining an initial/real rated capacity and an initial/real dischargeable electric quantity of each cell in a battery pack after a charge and discharge cycle of the battery pack; generating a first/second data diagram for every cells based upon the initial/real rated capacity and the initial/real dischargeable electric quantity; obtaining a first/second information of key cells in the first/second data diagram, defining an initial/real cell distribution region according to the first/second information by processing the first/second data diagram, and calculating a first/second area of the initial/real cell distribution region; and evaluating the consistency of the battery pack according to the first/second area. A strategy for balancing the battery pack is further provided.

Provided is a fixed-state testing device including a pressing part that presses a battery, a load detection part that detects a pressing load with which the battery is pressed, and a determination part that determines whether the state of fixing of the battery to a retention hole is good or bad. The determination part determines the fixed state of the battery to be good when the battery is able to maintain the pressing load within a first test load range for a first pressing time and, moreover, to thereafter maintain the pressing load within a second test load range of which an upper limit load is smaller than a lower limit load of the first test load range for a second pressing time.

A system for producing electrodes for lead-acid batteries is disclosed. An electrode that has been produced comprises at least one upper and/or one lower frame element as well as a lattice-shaped region that extends away from said upper or lower frame element and has a plurality of openings, the upper and/or lower frame element being of a greater thickness than the lattice-shaped region. Said system comprises the steps of: a) producing a profiled strip-shaped blank using a casting method in which the strip-shaped blank is formed, solely by means of said casting method, to have a greater thickness on one side in at least one of the regions which should eventually form the upper or lower frame element, than the thickness in regions which should eventually form the lattice-shaped region, and b) producing said lattice-shaped region with the openings in a subsequent expanded metal process.

A battery module of the present invention is adaptable to be utilized in various configurations including and not limited to an overlapping battery cell packaging configuration and a vertical stack battery cell packaging configuration used in an automotive and non-automotive applications. The battery module has a plurality of battery heatsink assemblies with the cells disposed therebetween. A plurality of rods extend through the each heatsink assemblies to secure the heatsink assemblies and the cell with one another to form the battery module.

A joining device includes a pair of cylindrical rotors 210 and 220, holding surfaces 211 and 221 of which for holding a pair of sheet-like members 30, respectively, have a width smaller than a width of the pair of sheet-like members 30. The joining device has a conveyance unit 200 which superimposes the pair of sheet-like members sequentially while conveying the pair of sheet-like members, by rotating the pair of cylindrical rotors, and joining units (first joining units 300) which join portions of the superimposed pair of sheet-like members to each other sequentially, the portions protruding beyond the holding surfaces of the cylindrical rotors.

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.

A method for manufacturing electrodes for lead-acid batteries includes producing a profiled strip blank in a casting process, wherein the casting process alone is sufficient to cause the strip blank to be formed of greater thickness on one side in a region corresponding to the upper frame element or the lower frame element than in another region corresponding to the meshed region; and producing the meshed region with the openings in a subsequent expanded metal process. In addition, an electrode produced by the method has an upper frame element, or a lower frame element, or both, and a meshed region extending away from the upper frame element, or the lower frame element, or both and having a plurality of openings. The upper frame element, the lower frame element, or both, is of greater thickness than the meshed region.

A stacking apparatus having a cylindrical conveyance drum holding and rotating to covey a separator and an electrode conveyance unit conveying a positive electrode in a tangential direction of the conveyance drum so that the positive electrode overlaps the separator. To the outer circumferential surface of the conveyance drum, there are defined a suction area for drawing the separator that is non-rotatably positioned on an upstream side of a rotation direction of the conveyance drum with respect to a location to which the positive electrode in conveyed and a non-suction area for removing the separator that is non-rotatably positioned on a downstream side of the rotation direction of the same. The separator in the suction area is conveyed to the non-suction area, is removed from the outer circumferential surface, and is transferred onto the positive electrode, thereby gradually stacking the separator on the positive electrode.

An electrode stacking device is an electrode stacking device for stacking electrodes supplied by a conveying device and forming an electrode stacked body, including an electrode support that receives the electrodes supplied by the conveying device and supports the electrodes, a mounting member to which a plurality of electrode supports is attached, a stacked unit having stacked portions of a plurality of levels on which the electrodes are stacked, and a discharge portion that discharges the electrodes supported by the plurality of electrode supports toward the stacked portions of the plurality of levels, in which the discharge portion discharges the electrodes at one interval with respect to the electrode supports per n levels (where n is an integer of 2 or more).