Lead-acid storage battery

The invention provides a lead-acid storage battery, which belongs to the technical field of storage batteries and comprises a main shell, a bipolar plate group, a positive single plate, a negative single plate and a partition plate. According to the lead-acid storage battery provided by the invention, the plurality of reaction units are connected in series through the bipolar plates inside the battery, and then the grids inside the battery are connected with the connecting terminals through the positive single plate and the negative single plate. The battery is not a multi-body battery which is externally connected with a plurality of battery monomers, but is an integrated battery which is internally connected. Therefore, parts such as a plate lug, a busbar and a middle pole of a traditional battery are omitted, and procedures such as polar plate splitting, busbar welding and middle pole welding of the traditional battery are omitted, so that the production cost of the battery is greatly reduced, the producti