Vertical-type baking apparatus of positive electrode material for secondary battery

Patent metadata

Field	Value
Publication number	US-2023053769-A1
Application number	US-202017787814-A
Country	US
Kind code	A1
Filing date	Dec 1, 2020
Priority date	Dec 20, 2019
Publication date	Feb 23, 2023
Grant date	—

Abstract

A vertical-type firing apparatus for a positive electrode material for a secondary battery, for vertically moving and firing the positive electrode material for the secondary battery, comprises: a vertical-type firing furnace including an exhaust part, an air supply part, and a firing space positioned between the exhaust part and the air supply part; and a heater for heating the firing space of the vertical-type firing furnace, wherein the firing space includes a temperature-raising space, a cooling space, and a temperature-maintaining space located between the temperature-raising space and the cooling space, and the temperature of the temperature-maintaining space is higher than the temperature of the temperature-raising space and the temperature of the cooling space.

First claim

1 . A vertical-type firing apparatus for a positive electrode material for a secondary battery for firing the positive electrode material for the secondary battery by moving the positive electrode material in a vertical direction, the vertical-type firing apparatus comprising:
a vertical-type firing furnace comprising an exhaust part positioned in an upper portion and through which internal gas is exhausted, an air supply part positioned in a lower portion and through which external gas is supplied, and a firing space positioned between the exhaust part and the air supply part and extending in the vertical direction; and a heater configured to heat the firing space in the vertical-type firing furnace, wherein the positive electrode material for the secondary battery is put into the exhaust part and discharged from the air supply part through the firing space, the firing space comprises a temperature-raising space communicating with the exhaust part, a cooling space communicating with the air supply part, and the temperature-maintaining space communicating with the temperature-raising space and the cooling space between the temperature-raising space and the cooling space, and temperature of the temperature-maintaining space is higher than the temperature of the temperature-raising space and the temperature of the cooling space.

2 . The vertical-type firing apparatus of claim 1 , wherein:
the heater heats only the temperature-maintaining space.

3 . The vertical-type firing apparatus of claim 1 , wherein:
the vertical-type firing furnace further comprises a rectangular pillar-shaped heat insulating material forming the air supply part, the exhaust part, and the firing space, and the heater is positioned inside the rectangular pillar-shaped heat insulating material to correspond to the temperature-maintaining space.

4 . The vertical-type firing apparatus of claim 1 , wherein:
the positive electrode material for the secondary battery is accommodated in a plurality of saggers stacked in the vertical direction in the firing space, and the vertical-type firing apparatus further comprises: an input part adjacent to the exhaust part and configured to put a first sagger positioned on the uppermost layer among the plurality of saggers into the exhaust part; and a discharge part adjacent to the air supply part and configured to discharge a second sagger positioned on the lowermost layer among the plurality of saggers from the air supply part.

5 . The vertical-type firing apparatus of claim 4 , wherein:
the input part comprises: a first roller configured to transfer the first sagger to the discharge part; and a first pusher configured to push the first sagger on the first roller to the exhaust part, and the discharge part comprises: a stopper configured to support a third sagger positioned on the second sagger among the plurality of saggers in the firing space; a supporter configured to support the second sagger discharged from the air supply part; a second roller adjacent to the supporter; and a second pusher configured to push the second sagger on the supporter onto the second roller.

6 . The vertical-type firing apparatus of claim 1 , wherein:
the vertical-type firing furnace further comprises: a cylinder-type heat insulating material forming the air supply part, the exhaust part, and the firing space; and an inner wall facing the firing space in the cylinder-type heat insulating material, and the heater is positioned inside the inner wall to correspond to the temperature-maintaining space.

7 . The vertical-type firing apparatus of claim 6 , wherein:
the positive electrode material for the secondary battery comes into contact with the inner wall in the firing space.

8 . The vertical-type firing apparatus of claim 6 , wherein:
a diameter of the firing space is greater than the diameter of the exhaust part and the diameter of the air supply part.

9 . The vertical-type firing apparatus of claim 1 , wherein:
the positive electrode material for the secondary battery is in the form of granules or briquettes.

Assignees

• Posco
• Res Inst Ind Science & Tech
• Posco Chem Co Ltd

Inventors

• Yang Choongmo
• Hwang Soon Cheol
• Park Yooncheol
• Jung Keeyoung

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• F27B9/34

  Arrangements of linings · CPC title

• F27B9/36

  Arrangements of heating devices · CPC title

• F27B9/3011

  arrangements for circulating gases transversally · CPC title

• F27B9/38

  Arrangements of devices for charging · CPC title