Full Range of Systems for Battery Powder Production

Onejoon is offering the full range of thermal systems, powder handling systems and process equipment for battery powder production.

Roller Hearth Kiln

Return Conveyor System and Automation

Saggar Handling Systems

Process Equipment

Rotary Drum Kilns

Conceptional Design and Engineering

Process & Kiln System Development / CFD-Simulation / Test-Center

 

Roller Hearth Kiln

A key product is the electrical heated gas-tight Roller Hearth Kiln with pneumatic air-lock systems and an indirect cooling zone to be able to run under oxygen atmosphere for production of Cathode Active Material (CAM) with higher Nickel content like NCM622, NCM811 and NCA which will be used in EV Lithium-Ion Batteries. We have a huge number of references in Korea and China for this kind of products and processes using both, hydroxide- or carbonate-based lithium source.

 

Return Conveyor System and Automation

The calcination process of Cathode Active Material (CAM) is carried out in powdery form. The material mixture of NCM or NCA pre-curser and lithium powder source (hydroxide or carbonate) will be normally filled into a prismatic ceramic saggar which finally is the transportation vehicle of the powder through the kiln. In the Roller Hearth Kiln the transport is been done by driven ceramic rollers, in the Pusher Kiln by a pusher machine, pushing the pusher plates with saggar stacks on a cerasmic track through the kiln.

After the saggars are leaving the kiln, they will be emptied by dumping off the material and guided back to the filling station to be used for the next filling and firing cycle. is done by the automatic Return Conveyor System.

Normally there is one Return Conveyor System for each kiln. But it is also possible to use one extended Return Conveyor System for two or more kilns. Even combined Return Conveyor Systems for different kiln systems or a Conveyor and Saggar Handling System with centralised filling system and dumping system for all kilns of the production area is possible.

The transportation of the saggars is done by driven stainless steel shafts with ceramic rings. The Return Conveyor System is encased by a housing to be able to protect the fresh calcinated products by a special carbon-free and/or dehumidified air, oxygen/air mixture or pure oxygen atmosphere. The housing is also used as protection to avoid bigger amounts of CAM powder getting into the production hall. The area of Return Conveyor directly behind the kiln outlet is also used as an extension of the cooling zone.

 

Saggar Handling Systems (SHS)

The Saggar Handling System (SHS) or Powder Handling System is integrated in the Return Conveyor System. It is generally consisting of following systems and units:

  • filling with weighing and powder levelling
  • stacking and unstacking of saggars
  • lifting, dumping and powder crashing
  • saggar inspection, cleaning, discharge

The configuration and design of the Saggar Handling System and the position of the systems and units within the Return Conveyor System is individual and customised, which will be defined together with the customer in the engineering phase.

 

Process Equipment

It is our big strength that we are able to engineer, design and manufacture the whole CAM powder process line starting from mixing the raw materials to packing into big bags next to our core business of manufacturing Kilns with Return Conveyor Systems and Saggar Handling respectively Powder Handling Systems.
This capability is unique for a battery kiln manufacturer and assures the optimal integration of the kiln system into the whole powder process line.
We have various references for engineering, manufacturing and installation of whole NCM622 and NCM811 one- and two-firing CAM powder production lines in Korea and China and a reference for basic engineering & conceptional design of a full NCM622 line in Europe.

Example for equipment, machinery and systems for an NCM622 two-firing powder process line:

 

Rotary Drum Kilns

Our team of engineers in Germany has a profound expertise in the design, manufacturing and operation of Rotary Drum Kilns. With a proven track record in middle and large scale rotary furnaces, we are happy to discuss any applications of the rotary furnace in the battery material manufacturing, from low temperature drying or calcination up to high temperature graphitization. As we have the possibility to run tests with a test Rotary Drum Kiln in our Test-Center in Bovenden, Germany, we want to motivate and invite you to contact us to start the discussion about using this kind of application for your process.

 

Conceptional Design and Engineering

More than 50% of our employees are highly educated and experienced engineers and experts. Most of them are working for our company for more than 10 years.

 

Process & Kiln System Development / CFD-Simulation / Test-Center

Over decades we are well known for our strength to develop new processes and kiln systems to fulfil new product requirements for our customers. This strength is mainly based on knowledge and experience of our process & kiln system experts, the R&D department and Test-Center personnel in Germany. These activities are supported by our product management team doing CFD-simulations and execution of testing programs.
In our Test-Center we have different batch or continuous kilns which can be modified in design and functionality to meet the needed process conditions and requirements.

 
Roller Hearth Kiln
© Onejoon RHK / Roller Hearth Kiln
 
Rotary Kiln
© Onejoon RK / Rotary Kiln
 
Turnkey complete solutions
© Onejoon Turnkey complete solutions
 

History of cooperation between Onejoon Co.Ltd. (Korea) and Eisenmann Thermal Solutions (Germany)

2015
Start of cooperation between Onejoon Co.Ltd. (Korea) and Eisenmann Thermal Solutions GmbH&Co.KG (Germany) based on a cooperation agreement. The cooperation comprises worldwide activities (Korea/China/EU/USA/RoW) mainly in the field of battery powders with focus on Cathode Active Material.

2017
Common execution of a basic engineering & conceptional design order for a 10kt NCM622 production line in Europe. Including gas-tight Roller Hearth Kilns, Return Conveyor System, Saggar Handling System and Process Equipment from mixing to packing with whole material flow and SHE concept.

2018
Common execution of an order for 5kt NCM622 production facility in China with 6 gas-tight Roller Hearth Kilns including Return Conveyor System, Powder Handling System and Process Equipment from mixing to packing including basic and detailed engineering, project management, manufacturing, installation and commissioning.

2019
Establishment of Eisenmann Thermal Solutions (Zhejiang) Co.Ltd. in Haining (PR China) with assembly hall of NET 7700 m² area to manufacture and assemble 10 RHKs kilns in parallel.

2020
Onejoon Co.Ltd. (Korea) acquires Eisenmann Thermal Solutions GmbH&Co.KG (Germany). The company name Eisenmann Thermal Solutions GmbH&Co.KG changes to Onejoon GmbH (Germany) being a part of the Onejoon Group.