Storage battery grid, method of manufacturing storage battery grid, and storage battery using storage battery grid

A method of manufacturing a storage battery grid comprising:

• forming a frame bone that includes a substantially rectangular shape;
• forming a lug portion that is connected to a first side portion of the frame bone and projects outwardly from the frame bone;
• forming a main bone that extends from a connection portion of the first side portion, to which the lug portion is connected, to a second side portion which is opposed to the first side portion;
• forming a sub-bone that extends from the first side portion to the second side portion;
• forming a plurality of slanted bones that extend obliquely toward the second side portion, at least part of the plurality of slanted bones branching from the main bone toward both sides;
• arranging the plurality of slanted bones at intervals in a direction in which the main bone extends;
• and
• causing at least part of a plurality of spaces, which are defined by the main bone and the sub-bone that are partially forming sides of the spaces, to include a substantially quadrilateral shape.

A storage battery grid comprising:

• a frame bone that includes a substantially rectangular shape;
• a lug portion that is connected to a connection portion of a first side portion of the frame bone, and extends outwardly from the first side portion;
• a main bone that extends perpendicularly from the connection portion to a second side portion of the frame bone which is opposed to the first side portion, a width of the main bone in a plan view decreasing in a direction away from the lug portion;
• a plurality of sub-bones which extend parallel to the main bone from the first side portion to the second side portion, the plurality of sub-bones comprising first sub-bones formed between the main bone and a third side portion of the frame bone, and second sub-bones formed between the main bone and a fourth side portion of the frame bone which is opposite the third side portion, the plurality of sub-bones being formed at intervals in a direction along the first side portion, and the intervals increasing in a direction away from the main bone;
• and
• a plurality of slanted bones which extend obliquely toward the second side portion, a slant angle of the plurality of slanted bones being in a range from 5 degrees to 60 degrees, and the plurality of slanted bones comprising:
• first slanted bones branching from the main bone and intersecting the sub-bone to form a plurality of quadrilateral spaces including a side defined by the main bone, the first slanted bones intersecting the plurality of sub-bones to form a plurality of quadrilateral spaces including a side defined by the second side portion.