Lead acid battery manufacturing method and lead acid battery

摘要

A lead-acid battery having a reliable exhaust structure suppressing unexpected leakage of acid mist and gas to outside the battery. The battery having a first gas exhaust path A for guiding gas generated in a plate pack from a cell compartment to a recess formed in a cover. A top lid is placed on the top surface of the cover to extend over the recess. The top lid and the cover form a closed shape so that the recess and the top lid form an exhaust chamber. A through hole for establishing communication between a first opening formed in the recess and a second opening formed in the outer surface of the cover, serves as a second gas exhaust path B which establishes communication with the first gas exhaust path A through the exhaust chamber.

主权项

1. A lead-acid battery, comprising:
a container which includes a cell compartment for housing a plate pack and an electrolyte and has an opening at a top thereof; a cover extending over the opening of the container; and a top lid covering a recess formed in a top surface of the cover, wherein the top lid is joined to the top surface of the cover to enclose the recess so as to form an exhaust chamber, the cover includes an internal gas exhaust path for guiding gas generated in the plate pack, from the cell compartment to the exhaust chamber, and also includes a plurality of external exhaust paths which establish communication between the recess and a portion outside the battery, a first external exhaust path of the plurality of external exhaust paths and a second external exhaust path of the plurality of external exhaust paths are directly connected to the same recess, said first external exhaust path and said second external exhaust path being disposed on opposite ends of the lead-acid battery, wherein when said top lid is disposed on said cover in a first orientation, said first external exhaust path is directly coupled to said exhaust chamber so as to allow gas to flow from said exhaust chamber to said first external exhaust path, and said second external exhaust path is isolated from said exhaust chamber, and when said top lid is disposed on said cover in a second orientation, said second external exhaust path is directly coupled to said exhaust chamber so as to allow gas to flow from said exhaust chamber to said second external exhaust path, and said first external exhaust path is isolated from said exhaust chamber.