Lid for cell tray, lid-attached cell tray, and method for manufacturing battery

1. A lid for a cell tray, comprising:

a cover which is configured to cover a battery accommodated in a cell tray;

and the cover includes upper and lower plate-shaped cover plates with a gap therebetween; and

a fire extinguishing liquid configured to be disposed in the gap,

wherein the fire extinguishing liquid is sealed in a package and disposed to be located above the battery when the cover is put over the battery accommodated in the cell tray, and

wherein the upper and lower plate-shaped cover plates include a plurality of opening holes.

2. The lid for a cell tray according to claim 1 , wherein the cover plate is substantially rectangular in planar shape, and

the fire extinguishing liquid is configured to be sealed in a package.

3. The lid for a cell tray according to claim 2 , wherein the package includes an aluminum laminate film.

4. The lid for a cell tray according to claim 1 , wherein an average opening area per one opening hole of the plurality of opening holes is from 12.56 to 50.24 mm 2 .

5. The lid for a cell tray according to claim 1 , wherein the cover plate has an opening ratio of 1.5% to 6%.

6. The lid for a cell tray according to claim 1 , wherein a material of the cover plate includes a metal, an inorganic matter, a metal oxide, glass, or a composite thereof.

7. The lid for a cell tray according to claim 1 , wherein the material of the cover plate includes aluminum or an aluminum alloy.

8. The lid for a cell tray according to claim 1 , wherein the material of the cover plate includes mica.

9. The lid for a cell tray according to claim 1 , wherein the lid has an average thickness from 4 mm to 10 mm.

10. The lid for a cell tray according to claim 1 , wherein the cover plate has an average thickness from 0.5 mm to 1.5 mm.

11. The lid for a cell tray according to claim 1 , wherein a weight of the fire extinguishing liquid per unit area of the cover plate is from 868 g/m 2 to 3472 g/m 2 .

12. The lid for a cell tray according to claim 1 , wherein the fire extinguishing liquid is configured to be sealed in four packages.

13. The lid according to claim 1 , wherein the battery includes one or more secondary batteries.

14. A lid-attached cell tray comprising:

a cell tray configured to accommodate a plurality of batteries; and

a lid for the cell tray including a cover which is configured to cover the batteries accommodated in the cell tray and the cover includes upper and lower plate-shaped cover plates with a gap herebetween, and a fire extinguishing liquid configured to be disposed in the gap,

wherein the fire extinguish liquid is sealed in a package and disposed to be located above the batteries when the lid is put over the batteries accommodated in the cell tray, and

wherein the upper and lower plate-shaped cover plates include a plurality of opening holes.

15. The lid-attached cell tray according to claim 14 , wherein the batteries include a plurality of secondary batteries.

16. A method for manufacturing a battery, the method comprising the steps of:

assembling the battery;

accommodating the battery in a cell tray;

charging and discharging the battery;

covering the battery accommodated in the cell tray with a lid for the cell tray, wherein the lid includes a cover which is configured to cover the battery accommodated in the cell tray and the cover includes upper and lower plate-shaped cover plates with a gap therebetween, and a fire extinguishing liquid configured to be disposed in the gap, wherein the fire extinguish liquid is sealed in a package and disposed to be located above the battery when the lid is put over the battery accommodated in the cell tray, and wherein the upper and lower plate-shaped cover plates include a plurality of opening holes; and

in a case that the battery accommodated in the cell tray is ignited, the fire extinguishing liquid is released to the ignited battery.

17. The method according to claim 16 , wherein the battery includes one or more secondary batteries.