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.

A method for forming an electrical connection to a microscale electrically conductive fibre material electrode element, such as a carbon fibre electrode element of a Pb-acid battery, comprises pressure impregnating into the fibre material an electrically conductive lug material, such as molten Pb metal, to surround and/or penetrate fibres and form an electrical connection to the fibre material and provide a lug for external connection of the electrode element. Other methods of forming a lug for external connection are also disclosed.

Provided is a lead-acid battery where a positive electrode shelf of one of two elements accommodated in cell chambers disposed adjacently to each other and a negative electrode shelf of the other element are electrically connected to each other through a penetrating connection body penetrating a partition wall, the penetrating connection body includes a positive electrode side member continuously formed with the positive electrode shelf and a negative electrode side member continuously formed with the negative electrode shelf, and the positive electrode side member and the negative electrode side member form a welded portion filled in a penetration hole formed in the partition wall for forming cell chambers by partitioning and are brought into close contact with a periphery of the penetration hole. In such an a lead-acid battery, a distance A between upper end surfaces of the positive electrode shelf and the negative electrode shelf and a lower end portion of the penetration hole is set to 3 mm to 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 set to 3 mm to 5 mm, a distance C between the upper end portion of the penetrating connection body and a level of the electrolyte solution is set to 0 mm or more, and a height of the positive electrode grid portion and the negative electrode grid portion is set to 100 mm or more.

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.

Battery grid (1) comprising a grid structure (4) containing grid arms (2, 2) and bordering arms (3), a supporting element (5) and lugs (6), as well as lead paste (7) spread on the surface of the supporting element (5).The invention also relates to a battery cell (35) comprising the battery grids (1) with separator plates (38) placed between them. The invention further relates to a storage battery (42) comprising battery cells (35) filled with acid. The supporting element (5) comprises fiberglass based material onto which the grid structure (4) is secured through chemical bond formed between the lead and the fiberglass. The lead paste (7) is secured to the supporting element (5) through chemical bond and the grid structure (4) has more than one lug (6). The battery cell (35) is composed of the battery grids (1). The lugs (41, 42) are connected to a jointing element (8). The storage battery (42) comprises the battery cells (35).

A battery terminal connector for terminating to a battery post of a battery. The battery terminal connector includes a cable attachment portion, a flange portion having a tightening member provided thereon, and a post engaging portion. A guard member is mounted on the flange portion. The guard member is moveable between a first position and a second position. The guard member has a projection which extends over the tightening member when the guard member is in the first position. The projection is removed from the tightening member when the battery terminal connector is properly positioned relative to the battery post and the guard member is in the second position. The battery terminal connector can only be terminated to the battery post when the battery terminal connector is properly positioned relative to the battery post.

The present application relates to an electrode tab pad plate, the electrode tab pad plate is of a fork shape, including a joint part and two first fork feet, the two first fork feet are arranged in parallel, and a first gap is provided between the two first fork feet, both the first fork feet are connected with the joint part. The electrode tab pad plate provided by the present application, through gathering the electrode tabs at inner sides of the electrode tab pad plate, so that the electrode tabs are gathered toward the direction away from the battery housing, so as to guarantee the safety performance of the Li-ion battery, since the space occupied by the electrode tab pad plate is small, which facilitates the improvement of the cell capacity, thereby improving the performance of the battery.

The application relates to an apparatus and to a method for moulding battery components using an apparatus comprising: a mould block having a plurality of mould cavities; a molten metal feed trough adjacent to the mould block and extending in a generally longitudinal direction along the mould block; a plurality of weirs between the feed trough and each of the cavities; a supply for providing molten metal to the trough; wherein the feed trough is provided with at least one volume adjustment mechanism, which is operable to alter the volume of the feed trough.

An apparatus for moulding battery components comprising a molten metal feed trough 130, a mould block 100 adjacent to the mould block, a weir 133 between the feed trough and each cavity and a supply 132 for feeding molten metal to the feed trough. The mould block has at least one mould cavity 110 and a cooling arrangement which cools the mould block, and the mould block is provided with a heating arrangement 150 adjacent to the or each mould cavity. In use, the heating arrangement maintains at least part of the, or each, mould cavity at an elevated temperature relative to the average operational temperature of the mould block.

A method for forming an electrical connection to a microscale electrically conductive fiber material electrode element, such as a carbon fiber electrode element of a Pb-acid battery, comprises pressure impregnating into the fiber material an electrically conductive lug material, such as molten Pb metal, to surround and/or penetrate fibers and form an electrical connection to the fiber material and provide a lug for external connection of the electrode element. Other methods of forming a lug for external connection are also disclosed.