Bipolar battery electrode

In a bipolar battery comprising a stack of bipolar electrodes each comprising a substantially planar, electrolyte-impervious, electrically conductive septum having a positive polarity face and a negative polarity face on opposite sides thereof, and a monopolar electrode at each end of said stack, the improvement comprising:

• a nonconductive electrode frame engaging the periphery of each of said bipolar electrodes;
• a pair of mesa-like, nonconductive lattices integral with and on opposite sides of said electrode frame, said lattices each laying inboard the periphery of, and standing in relief from, said electrode frame so as to overlay and provide a plurality of pockets extending across said face,
• a shoulder formed between said frame and said lattice and surrounding said lattice;
• active material filling said pockets;
• discrete spacer frames interjacent said electrode frames for spacing said electrodes from each other, said spacer frames each having a pair of faces on opposite sides thereof confronting said electrode frames, and an internal rim defining an electrolyte retention region between adjacent electrodes in said stack;
• an annular recess in each of said faces contiguous said rim receiving a said shoulder such that a said lattice nests within said spacer frame;
• and
• terminal means engaging said monopolar electrodes for electrically connecting said battery to external electrical circuitry.