Lead-acid battery having a fluid compartment for reducing convection-induced heat transfer

A lead-acid storage battery comprising at least one inside plastic container having a bottom and top, partitions dividing said inside container into cells,

• an outside container spaced from said inner container to provide a fluid compartment annular space around the periphery of the battery defined by height and width and having end and side portions, at least one of said inside and outside containers having a series of fluid baffles spanning the width of said fluid compartment, each of said fluid baffles being less than the height of the fluid compartment and providing a fluid flow path through the fluid flow compartment and about the inside container,
• a fluid inlet formed in said outside container having a plug which may be removed to allow ingress into said fluid compartment,
• said inside and outside containers being attached to each other,
• a cell element comprising positive and negative plates and separators positioned in said cells, said cells being electrically connected together,
• a cover sealed to at least said inside battery container, and
• terminals electrically connected to said cell elements.