Metal air fuel cell and its system

A metal air fuel cell, comprising:

• a plurality of unit bodies arranged in parallel in a battery housing (12), each of the plurality of unit bodies comprising a housing (1), a front cover (2), an alloy plate (3), a sealing ring (4), a battery cover (5), an upper copper electrode (6), an air electrode (7), a back cover (8);
• wherein a front part of the housing (1) is sealed by the bonding of the front cover (2) and the air electrode (7) to form a cavity between the housing and the front cover (2) and the air electrode (7), a rear part of the housing (1) is sealed by the bonding of the back cover (8) and the air electrode (7) to form a cavity between the housing (1) and the back cover (8) and the air electrode (7), the sealing ring (4) is placed in an annular groove (i) formed on a bottom side of the battery cover (5), the upper copper electrode (6) is placed in a groove formed on a top side of the battery cover (5) through a side gap of the battery cover (5), and the upper copper electrode (6), the battery cover (5) and the alloy plate (3) are connected by bolts to form a metal fuel monomer;
• wherein the metal fuel monomer is put into the housing (1) through a mouth part of the housing (1), and an annular protrusion (e) is formed around the mouth part of the housing (1), the annular protrusion (e) is inserted into the annular groove (i) formed on the bottom side of the battery cover (5), and the annular protrusion (e) presses the sealing ring (4) in the annular groove (i) formed on the bottom side of the battery cover (5);
• wherein a circular through hole is formed in a lower part of the housing (1), and three locating holes (a) are evenly distributed around the through hole, a circular groove is on one side of the housing (1) at a position corresponding to one end of the circular through hole, and a circular protrusion is formed on an opposite side of the housing (1) at a position corresponding to another end of the circular through hole, and a sealing ring is arranged inside the circular groove, and when the plurality of unit bodies are grouped together by bolts through the three locating holes, the sealing rings are compressed by the circular protrusions and a seal between each pair of the plurality of unit bodies is realized;
• wherein the three locating holes (a) include an upper locating hole above the circular through hole, a left locating hole on the left of the circular through hole, and a right locating hole on the right of the circular through hole, the upper locating hole is formed in and passes through a support (b) in the housing (1), and both sides of the housing are supported by the support (b);
• wherein a reinforcing rib (f) is set on both sides of the mouth part of the housing (1);
• wherein the bottom side of the battery cover (5) is provided with an inclined plane (m);
• wherein a slope (h) is formed in a bottom of the housing (1), whose inclination is between 2 and 60 degrees;
• wherein the two end portions on the top side of the housing (1) each is provided with a groove (d), and a locating hole is in a groove (d), slipknot bolts are put into the groove (d), and positioned by bolts passing through locating holes, by the pre-tightening of slipknot bolts and a pressing plate in an upper part of the battery cover (5), the battery cover (5) is fixed on the housing (1), a through hole (g) is formed beside each groove (d), and the through hole (g) passes through an inner cavity of the housing (1), grooves and protrusions are formed on two sides of the housing (1) at a position corresponding to two ends of the through hole (g), respectively, seal rings are placed in the grooves, thus when the plurality of unit bodies are grouped together by bolts passing through locating holes in the groove (d), a seal between each of pair of the plurality of unit bodies is realized;
• wherein a height of one end of the inclined plane (m) is above the through hole (g) on the housing (1).