Gs Yuasa International Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Yu Kojima

Kenji Izumi

Mikihito Hasegawa

Kazuhiro Sugie

Etsuko Ogasawara

Shinsuke Oki

Takeshi Chiba

Kazuhiko Shimoda

Kazunari Ando

Misaki Harada

Shinsuke Ooki

Yuya Nakamura

Tatsuya Morii

Yoshinobu Sato

A transport structure () for a lead-acid battery () includes: a packing box () in which a lead-acid battery () is packed, in which an upper wall portion () is formed by two flaps () extending from two first side wall portions () facing each other of the packing box (), and in which a distal end portion () of at least one of the flaps () is bent and inserted into the packing box (); and an upper buffer body (A) disposed outside the upper wall portion (), the upper buffer body (A) including an upper wall portion () facing the upper wall portion ().

Transport structure for lead-acid battery

A vent plug () includes a head portion (), a cylindrical portion (), and a filter (). The cylindrical portion () includes a cylinder portion (), a screw thread portion (), a slit (), and a through hole (). The filter () is disposed at a position where the through hole () is provided in a central axis (L) direction. The screw thread portion () intersects the slit () only at a first-peripheral screw thread portion.

Vent plug for lead-acid battery and lead-acid battery

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.

Lead-acid battery

Disclosed is a lead-acid battery including: a battery container; an electrolyte and an electrode plate group in the battery container; and a battery container cover that hermetically seals an opening of the battery container, wherein the electrode plate group includes a positive electrode plate including a positive electrode active material, a negative electrode plate including a negative electrode active material, and a separator interposed between the positive electrode plate and the negative electrode plate, the battery container cover is provided with a liquid port, a liquid port plug that closes the liquid port, and a sleeve that hangs down from the liquid port to a prescribed liquid surface height of the electrolyte, a sodium ion concentration contained in the electrolyte is 1 mmol/L to 90 mmol/L, and a specific surface area of the positive electrode active material is 5 m/g to 9 m/g.

Lead storage battery

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.

A lead acid battery including: a positive electrode plate including a positive electrode grid and a positive electrode active material; a negative electrode plate including a negative electrode grid and a negative electrode active material; an electrode plate group including the positive electrode plate, the negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate; a battery container including a plurality of cell chambers each accommodating the electrode plate group and an electrolyte; and a lid sealing an opening of the battery container. A ratio P/N of mass P of the positive electrode active material to mass N of the negative electrode active material is 1.25 or more and 1.65 or less. The negative electrode grid contains bismuth in an amount of 1 ppm or more and 300 ppm or less.

Lead acid battery

In a lead-acid battery including an electrode plate group housed in a cell chamberwith an electrolyte, each positive electrode plate includes a positive electrode grid made of lead or a lead alloy containing no antimony, and a positive electrode active material with which the positive electrode grid is filled. Each negative electrode plate includes a negative electrode grid made of lead or a lead alloy containing no antimony, a surface layer formed on a surface of the negative electrode grid and made of a lead alloy containing antimony, and a negative electrode active material with which the negative electrode grid is filled. A mass ratio M/Mfalls within a range of 0.70 to 1.10, where Mrepresents the mass of the positive electrode active material per cell chamber, and Mrepresents the mass of the negative electrode active material per cell chamber.

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Shizuoka, Japan

Yu Kojima