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Three New Patents For Sakuu

3D printed battery concept from Sakuu patent [Source: Google Patents]

Mysterious 3D print startup Sakuu reveals they have obtained not one, but three new intriguing patents.

If you’re not familiar with Sakuu, and you likely aren’t due to the company’s stealthy mode, they are developing a method of 3D printing batteries for practical storage of electricity. A few weeks ago I did some sleuthing on the company and found out, well, not very much.

Now they’ve announced three patents.

The first patent is for a method of creating a “monolithic ceramic electrochemical cell housing an anode and cathode receptive space”. This seems to be US patent WO2019152531A1, “Hybrid solid-state cell with a sealed anode structure”. The image at top shows how the battery would be constructed.

This seems to be related to the design of a lithium battery where they overcome the constraints of lithium use for the anode. Could this be 3D printed?

The second patent is more interesting, US patent US10974453B2, “Three-dimensional, additive manufacturing system, and a method of manufacturing a three-dimensional object”.

Additive manufacturing system overview from Sakuu patent [Source: Google Patents]

As is often seen, this patent description is a gibberishy mix of tech and legal terms:

“A three-dimensional, additive manufacturing system is disclosed. The first and second printer modules form sequences of first patterned single-layer objects and second patterned single-layer objects on the first and second carrier substrates, respectively. The patterned single-layer objects are assembled into a three-dimensional object on the assembly plate of the assembly station. A controller controls the sequences and patterns of the patterned single-layer objects formed at the printer modules, and a sequence of assembly of the first patterned single-layer objects and the second patterned single-layer objects into the three-dimensional object on the assembly plate. The first transfer module transfers the first patterned single-layer objects from the first carrier substrate to the assembly apparatus in a first transfer zone and the second transfer module transfers the second patterned single-layer objects from the second carrier substrate to the assembly apparatus in a second transfer zone. The first and second printer modules are configured to deposit first and second materials under first and second deposition conditions, respectively. The first and second materials are different and/or the first and second deposition conditions are different.”

I’m not quite sure what that means, and I am sure you do not either. However, it appears to be a description of a manufacturing system that would be used to produce 3D printed batteries at scale. After reading through the patent a few times, it seems it’s for a kind of multi-material binder jetting process.

That lines up with the notion of producing batteries, which are made from several materials, and also from a production standpoint: binder jetting can be scaled to large volumes and speeds. Their description includes a belt as the print surface, which could imply rapid motion.

3D printer process overview from Sakuu patent [Source: Google Patents]

The third patent is for a 3D printer, US Patent US20200171752A1, “Electrophotographic multi-material 3d printer”. This patent describes a unique 3D printing system in which multiple processes are used, such as both binder jetting and PBF approaches.

They seem to have developed a way to use electrophotographic techniques to 3D print ceramic, metal and polymer materials, including conductive materials. This overcomes the normal limitations of electrophotographic thickness constraints.

The system diagram also seems to be designed for speed, as there are a number of rollers and belts that could pull material along for rapid deposition at the bottom.

This is all still unclear, but that’s because patents are meant to be vague in order to cover off many possible variations of the approach.

We’ll know more when Sakuu releases more specific product information.

Via Sakuu

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