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.

The present disclosure provides an electrode assembly and a secondary battery. The electrode assembly includes a first electrode plate, a second electrode plate and a separator. The first electrode plate, the second electrode plate and the separator are wound to a flat structure, and the flat structure comprises a main region and corner regions, the corner regions are provided at two ends of the main region along a width direction of the main region. The first electrode plate and the second electrode plate each are wound to turns. A gap is provided between two adjacent turns of the first electrode plate, the gap includes a first gap and a second gap. The first gap corresponds to the corner region in position, the second gap corresponds to the main region in position, and a dimension of the first gap is larger than a dimension of the second gap.

A rechargeable battery capable of preventing rust generation at an opening side of a battery case. The rechargeable battery according to embodiments of the present invention includes: an electrode assembly; a case having an opening and accommodating the electrode assembly; and a cap assembly electrically connected to the electrode assembly, and coupled to an opening side of the case with a gasket interposed therebetween, wherein the opening side of the case includes a trimming end, a gap proximate the trimming end, and a coating layer on an inner surface of the gap proximate the trimming end.

Provided is a wound cell, formed by successively stacking and winding of first separator, first electrode plate, second separator and second electrode plate from head ends thereof, the first separator is located at innermost side of the flat-shaped cell; a first and second electrode tab is electrically connected with the first and second electrode plate, respectively; the first and second electrode tabs are located on a flat plane of the flat-shaped cell along a length direction thereof and do not overlap each other in a thickness direction thereof; a distance from the first or second electrode tab to a tail end of the first or second current collector is no larger than of total length of the first or second current collector, a sum of number of layers of the first separator and the second separator at the innermost side of the cell is no more than two.

Disclosed is a battery module for effectively removing the heat generated from battery cells and minimizing the deformation of the battery cells caused by external impacts, and the battery module includes a battery cell stack having a plurality of battery cells electrically connected to each other, and a module case accommodating the battery cell stack, wherein each battery cell includes a pouch-type case having an accommodation portion so that a rim of the accommodation portion is sealed, an electrode assembly provided in the accommodation portion of the pouch-type case, and an electrode terminal having one end connected to the electrode assembly and the other end protruding out of the pouch-type case, wherein the pouch-type case has a wing portion formed by fusing at least a part of the rim where the electrode terminal is not formed, and wherein a cooling member is provided to at least one space between the wing portion and the accommodation portion.

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.

To provide a convenient and effective method for suppressing the penetration of dendrite over the microporous film mainly containing the base portion, which occupies the most part of the entire separator (total area), rather than the peculiar concept (resulting in a difficult measure), in which only the pore structure of the rib portion is densified or contracted for suppressing dendrite from penetrating through the rib portion. A separator for a lead-acid battery, containing a microporous film obtained in such a manner that a raw material composition mainly containing a polyolefin resin, silica powder, and a plasticizer is melt-kneaded and formed into a film, from which the plasticizer is entirely or partially removed, the raw material composition containing glass flakes having an average particle diameter of from 20 to 800 m and an average thickness of 0.2 to 8 m and having no self-film formability in an amount of from 2 to 15% by weight based on a total amount of the silica powder and the glass flakes, the glass flakes in the microporous film being disposed in such a manner that a plane direction thereof is substantially oriented in a plane direction of the microporous film, a value of (the content of the glass flakes in the microporous film)/(the average thickness of the glass flakes in the microporous film) being 1 or more.

[Problem] To provide a nonwoven fabric (pasting mat) that does not undergo bonding between the nonwoven fabrics (pasting mats) even under severe conditions (a pressure in winding and a high temperature and a high humidity in transportation, storage, and production).

[Means for Resolution] A pasting mat for lead acid batteries, containing a microglass fiber and a heat-fusible binder fiber, wherein the pasting mat has a thickness under a pressure of 20 kPa of 0.02 mm or more and less than 0.1 mm, and has a bonding strength between the pasting mats after being left for 48 hours under a pressure of 5 to 10 kPa in an environment of a temperature of 70 to 90? C. and a humidity of 75% of less than 0.05 N.

A non-aqueous electrolyte secondary battery includes battery element formed by laminating and winding positive electrode and negative electrode via separator. Positive electrode includes a positive electrode current-collector-exposed portion, in which the positive electrode current collector is exposed over a length dimension of not less than one turn of the winding of battery element in the outermost circumference and an intermediate layer portion of the winding. The negative electrode in a part facing the positive electrode current collector exposed in the intermediate layer portion includes the negative electrode active material layer laminated on the negative electrode current collector. Negative electrode can be provided with a slit at an exposed side with respect to both exposed ends of the positive electrode current-collector-exposed portion.

An energy storage device includes: a core; and a wound body including, layered and wound around the core: a positive electrode, a negative electrode, and two separators, one of which is interposed between the positive electrode and the negative electrode and each having a first surface and a second surface. The first surface has thermal bonding properties superior to thermal bonding properties of the second surface, and at least one of the two separators is bonded to the core via the first surface thereof.