Powder sintering system

Patent metadata

Field	Value
Publication number	US-2017170457-A1
Application number	US-201715443304-A
Country	US
Kind code	A1
Filing date	Feb 27, 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, a first dispersing device, a second dispersing device, and a heating 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, and configured to centrifugally disperse and throw powder from the bottom to the side wall. The at least one second dispersing device is located on the side wall, and configured to centrifugally disperse and throw the powder from the side wall to a center of the funnel shaped chamber. The heating device is located outside the furnace body.

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.

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 , further comprising a surface coating layer is coated on an inner wall of the furnace body, wherein the surface coating layer is a ceramic-based coating layer, a graphite-based coating layer, or a polytetrafluoroethylene coating layer.

4 . 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.

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

6 . 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.

7 . The powder sintering system of claim 6 , 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.

8 . 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.

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 extend 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, and a tapered container, wherein the tapered container is connected to the funnel shaped chamber through the feed pipe.

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 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; 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; an exhaust device configured to discharge flue smoke produced in the funnel shaped chamber in sintering process; a feed device located on 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 , further comprising a surface coating layer coated on an inner wall of the furnace body, wherein the surface coating layer is a ceramic-based coating layer, a graphite-based coating layer, or a polytetrafluoroethylene coating layer.

14 . 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.

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

16 . The powder sintering system of claim 1 , wherein the plurality of dispersing devices are located at a same height on the side wall of the furnace body.

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

18 . 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, the actuator is located outside the furnace body for driving the dispersing wheel.

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, and a tapered container the tapered container is connected to the funnel shaped chamber through the feed pipe.

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

• H01M4/1391 Primary

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

• H01M4/131

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

• C01B21/068

  with silicon · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title