Sealed secondary battery assembly

A sealed secondary battery assembly, comprising:

• electricity-generating elements;
• battery cell cases formed as rectangular tubes having a bottom, opposing partition walls and opposing side walls defining a cell case aperture, said electricity-generating elements being disposed respectively in said battery cell cases;
• battery cell case covers sealing said cell case apertures to form a plurality of sealed battery cells;
• said battery cell cases being disposed serially adjacent one another and said partition walls having partition wall surfaces with contacting portions contacting adjacent ones of said partition walls thereby forming an assembled battery case, said partition walls forming partition sections which partition said sealed battery cells from one another;
• end plates disposed on exposed ones of said partition wall surfaces at ends of said assembled battery case;
• restraining straps connecting said end plates and disposed about a lateral periphery of said assembled battery case to pull together said battery cell cases to form said assembled battery case;
• said battery cell case covers being serially disposed and formed as a unitary cover which is a unitary molding;
• electrical connection elements passing through said partition sections, formed by the partition walls, to serially connect said electricity-generating elements without use of electrical connection members extending through said battery cell case covers;
• said portion walls defining coolant passages in said partition sections;
• and
• said battery cell case covers defining apertures communicating with said coolant passages and disposed at locations said unitary cover corresponding to said coolant passages.