Powder sintering system

Patent metadata

Field	Value
Publication number	US-2017167791-A1
Application number	US-201715442520-A
Country	US
Kind code	A1
Filing date	Feb 24, 2017
Priority date	Aug 29, 2014
Publication date	Jun 15, 2017
Grant date	—

Abstract

A powder sintering system is disclosed. The powder sintering system includes a furnace body, at least one first dispersing device, at least one second dispersing device, a heating device, and a gas introducing device. The furnace body includes a bottom and a side wall defines a funnel shaped chamber. The at least one first dispersing device is located on the bottom of the furnace body, and disperses powder from the bottom of the furnace body to the side wall of the furnace body. The at least one second dispersing device is located on the side wall of the furnace body, and centrifugally disperse powder from the side wall of the furnace body to a center of the funnel shaped chamber. The heating device is located outside the furnace body. The gas introducing device supplies a protecting gas into the funnel shaped chamber.

First claim

What is claimed is:

1 . A powder sintering system, comprising:
a furnace body comprising a bottom and a side wall defining a funnel shaped chamber; at least one first dispersing device located on the bottom of the furnace body, the at least one first dispersing device configured to centrifugally disperse powder from the bottom of the furnace body to the side wall of the furnace body; at least one second dispersing device located on the side wall of the furnace body, the at least one second dispersing device configured to centrifugally disperse powder from the side wall of the furnace body to a center of the funnel shaped chamber; a heating device located outside the furnace body; and a gas introducing device supplying a protecting gas into the funnel shaped chamber.

2 . The powder sintering system of claim 1 , wherein an upper portion of the furnace body has a hollow column shaped structure, a lower portion of the furnace body has a hollow frustum shaped structure, and the hollow column shaped structure and the hollow frustum shaped structure are connected together to form the furnace body.

3 . The powder sintering system of claim 1 , wherein the at least one first dispersing device is located at a center of the bottom of the furnace body.

4 . The powder sintering system of claim 1 , wherein the at least one second dispersing device is adjacent to a top of the furnace body.

5 . The powder sintering system of claim 1 , wherein the at least one second dispersing device is a plurality of second dispersing devices located at a same height on the side wall of the furnace body relative to the bottom of the furnace body.

6 . The powder sintering system of claim 5 , wherein the plurality of second dispersing devices form one or more pairs of second dispersing devices, each pair of second dispersing devices having two opposing second dispersing devices opposite to each other with respect to a central axis of the furnace body.

7 . The powder sintering system of claim 1 , wherein each of the at least one first dispersing device and the at least one second dispersing device comprises a dispersing wheel and an actuator, the dispersing wheel is located inside the furnace body, and the actuator is located outside the furnace body for driving the dispersing wheel.

8 . The powder sintering system of claim 1 , wherein the gas introducing device comprises at least one intake pipe located on the side wall between a top of the furnace body and the at least one second dispersing device, the at least one intake pipe is angled downwardly towards the bottom wall along a direction defining an angle with a center axis of the funnel shaped chamber, and the angle of the at least one intake pipe is in a range between 0 degrees and 90 degrees.

9 . The powder sintering system of claim 1 , further comprising an exhaust device configured to discharge smoke or gas produced in the funnel shaped chamber in a sintering process, the exhaust device comprising a gas-solid separating unit, an automatic control valve, a gas buffer unit, and an exhaust pipe, wherein the gas-solid separating unit is located on a top of the furnace body, the gas buffer unit is located on an end of the gas-solid separating unit away from the furnace body, the exhaust pipe extends from an end of the gas buffer unit, and the automatic control valve is located on the exhaust pipe.

10 . The powder sintering system of claim 1 , further comprising a feed pipe, a tapered container, and a gas exchanging room, wherein the tapered container is connected to the funnel shaped chamber through the feed pipe, and the gas exchanging room is located at an end of the tapered container away from the furnace body.

11 . A powder sintering system, comprising:
a furnace body comprising a bottom and a side wall defining a funnel shaped chamber with a closed structure; at least one first dispersing device located on the bottom of the furnace body, the least one first dispersing device configured to centrifugally disperse powder from the bottom of the furnace body to the side wall of the furnace body; a plurality of second dispersing devices located on the side wall, the second dispersing devices each configured to centrifugally disperse powder from the side wall of the furnace body to a center of the funnel shaped chamber; a heating device located on outer surface of the outside the furnace body; a gas introducing device supplying a protecting gas into the funnel shaped chamber; an exhaust device configured to discharge flue smoke produced in the funnel shaped chamber in a sintering process; a feed device located on a top of the furnace body; and a discharge device located on a lower portion of the side wall of the furnace body to discharge the sintered powder from the funnel shaped chamber.

12 . The powder sintering system of claim 11 , wherein an upper portion of the furnace body has a hollow column shaped structure, a lower portion of the furnace body has a hollow frustum shaped structure, and the hollow column shaped structure and the hollow frustum shaped structure are connected together to form the funnel shaped chamber.

13 . The powder sintering system of claim 11 , wherein the at least one dispersing device is located at a center of the bottom of the furnace body.

14 . The powder sintering system of claim 11 , wherein the plurality of second dispersing devices are adjacent to the top of the furnace body.

15 . The powder sintering system of claim 11 , wherein the plurality of second dispersing devices are located at a same height on the side wall of the furnace body.

16 . The powder sintering system of claim 15 , wherein the plurality of second dispersing devices form one or more pairs of second dispersing devices, each pair of second dispersing devices having two opposing second dispensing devices opposite to each other with respect to a central axis of the furnace body.

17 . The powder sintering system of claim 11 , wherein each of the at least one first dispersing device and the at least two second dispersing devices comprises a dispersing wheel and an actuator, the dispersing wheel is located inside the furnace body, and the actuator is located outside the furnace body for driving the dispersing wheel.

18 . The powder sintering system of claim 11 , wherein the gas introducing device comprises a plurality of intake pipes located on the side wall of the furnace body between the top of the furnace body and the at plurality of second dispersing devices, each of the plurality of intake pipes is angled downwardly towards the bottom of the furnace body along a direction defining an angle with a center axis of the funnel shaped chamber, and the angle of the intake pipe is in between 0 degrees and 90 degrees.

19 . The powder sintering system of claim 11 , wherein the exhaust device comprises a gas-solid separating unit, an automatic control valve, a gas buffer unit, and an exhaust pipe, the gas-solid separating unit is located on the top of the furnace body, the gas buffer unit is located on one end of the gas-solid separating unit away from the furnace body, the exhaust pipe extends from an end of the gas buffer unit, and the automatic control valve is located on the exhaust pipe.

20 . The powder sintering system of claim 11 , wherein the feed device comprises a feed pipe, a tapered container, and a gas exchanging room, the tapered container is connected to the funnel shaped chamber through the feed pipe, and the gas exchanging room is located on at an end of th

Assignees

• Jiangsu Huadong Inst Of Li-Ion Battery Co Ltd
• Univ Tsinghua

Inventors

• He xiang-ming
• Li Jian-Jun
• Zhang jian-li
• Wang Li
• Shang yu-ming
• Xu cheng-hao
• Luo Jing
• Gao Jian

Classifications

• H01M4/0471 Primary

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• F27B15/003

  Cyclones or chain of cyclones · CPC title

• F27D2003/0077

  Use of centrifugal devices · CPC title

• F27B15/14

  Arrangements of heating devices · CPC title