Metal-air battery unit and metal-air battery

1. A metal-air battery unit comprising:

a unit main body that includes a plurality of metal-air battery cells; and

a water supply space and an electrical system space disposed on an outer surface of the unit main body, the water supply space supplying an electrolyte to the metal-air battery cells, the electrical system space coupling to a positive electrode and a negative electrode of each metal-air battery cell to control a battery output,

wherein the water supply space is provided on a top surface side of the unit main body, and the water supply space includes a plurality of water supply holes that communicably connect with each respective metal-air battery cell, and

wherein the electrolyte can be collectively supplied into each metal-air battery cell from the water supply space via the water supply holes.

2. The metal-air battery unit according to claim 1 , wherein

an upper case is installed on the top surface side of the unit main body, and the water supply space and the electrical system space are disposed in the upper case in one body.

3. The metal-air battery unit according to claim 1 , wherein the water supply space is a water supply space shared by the respective metal-air battery cells.

4. The metal-air battery unit according to claim 1 wherein

the electrical system space includes a wiring space coupled to the positive electrode and the negative electrode of the metal-air battery cell and a substrate space in which a substrate with controls for battery output can be installed.

5. The metal-air battery unit according to claim 1 , wherein

the metal-air battery cell has a top surface on which a tubular portion including a wiring port from which a wiring coupled to the positive electrode and the negative electrode of the metal-air battery cell is extracted projects into the electrical system space, and the wiring port is positioned higher than a bottom surface of the electrical system space.

6. The metal-air battery unit according to claim 1 , wherein

the metal-air battery cell has a top surface on which a tubular portion including a wiring port from which a wiring coupled to the positive electrode and the negative electrode of the metal-air battery cell is extracted projects into the electrical system space, and the wiring port is positioned higher than an electrolyte of a fully-filled electrolyte supplied to the water supply space.

7. A metal-air battery comprising:

a unit main body that includes a plurality of metal-air battery cells;

a water supply space disposed on a top side of the unit main body, the water supply space being shared by the respective metal-air battery cells; and

a cover that has one end with an opening, the cover being configured to house the unit main body through the opening, wherein

the cover doubles as a water supply container for the water supply space configured to house an aqueous electrolyte in a state where the cover is removed from the unit main body with the opening facing upward, and the cover has an inner wall surface where a mark to indicate a water supply amount to the water supply space is disposed.

8. The metal-air battery according to claim 7 , wherein

the inner wall surface of the cover has a protrusion that suppresses a rattle of the unit main body.

9. The metal-air battery according to claim 8 , wherein

the protrusion extends toward an insertion direction of the cover to the unit main body.

10. The metal-air battery according to claim 7 , wherein the mark is a water level line.

11. The metal-air battery according to claim 7 , wherein the cover includes water supply handles.

12. The metal-air battery according to claim 11 , wherein

the water supply handles are disposed in respective approximately centers of an opposing left side portion and right side portion of the cover, or the water supply handle disposed in the left side portion is positioned to one side with respect to a center in a width direction of the left side portion, and the water supply handle disposed in the right side portion is positioned to another side on an opposite side to the one side with respect to a center in a width direction of the right side portion.

13. The metal-air battery according to claim 1 , wherein the metal-air battery comprises a salt for preparing a salt water as the electrolyte, and the salt has a grain diameter of 300 μm or less.

14. The metal-air battery unit according to claim 1 , wherein the unit main body has a top surface side on which one upper case and another upper case are installed, and the water supply space is disposed in the one upper case, and the electrical system space is disposed in the other upper case.