Flooded lead acid battery with tilt-over capability

H - Electricity – 01 – M

Patent

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Details

H01M 2/12 (2006.01) H01M 2/36 (2006.01)

Patent

CA 2324232

In a battery configuration including a casing (14) having a bottom, side and top surfaces, the top surface having a plurality of cell openings (22) therein, an improved flowpath is provided for liquid electrolyte when the battery is tilted onto any of its side surfaces. The flowpath includes a cover chamber for each cell opening defined by a substantially rectangular peripheral wall surrounding a cell opening; a cylindrical wall (24) surrounding and substantially concentric with the cell opening and located within the substantially rectangular wall, the cylindrical wall interrupted by a relatively small circumferential gap (26), and a wall (34) extending between the cylindrical wall and the adjacent side of the peripheral wall, the wall tangential to the cylindrical wall and adjacent the gap. A porous polytetrafluoroethylene disc (42) seated in the battery cover vent openings prevents spillage even if the battery casing is inverted.

Dans une configuration d'un accumulateur comprenant un bac (14) présentant des surfaces inférieure, latérales et supérieure, la surface supérieure a une pluralité d'ouvertures de pile et un chemin d'écoulement est amélioré pour l'électrolyte liquide lorsque l'accumulateur est incliné sur chacune de ses surfaces latérales. Le chemin d'écoulement comprend une chambre couvercle pour chaque ouverture de pile définie par une paroi périphérique sensiblement rectangulaire entourant l'ouverture de pile; une paroi cylindrique (24) et sensiblement concentrique par rapport à l'ouverture de pile et placée dans la paroi sensiblement rectangulaire, la paroi cylindrique étant interrompue par une fente (26) périphérique relativement petite. Une paroi (34) s'étend entre la paroi cylindrique et le côté adjacent de la paroi périphérique, la paroi étant tangentielle par rapport à la paroi cylindrique et adjacente à la fente. Un disque polytétrafluoroéthylène poreux (42) logé dans les ouvertures de ventilation du couvercle de l'accumulateur évite le déversement accidentel même si le bac de l'accumulateur est renversé.

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