Development and production of phase change materials (PCM) and macro-encapsulations for thermal energy and cold storage.

Axiotherm GmbH

Eisenberg/Thuringia (Headquarters, Production) · Bad Saarow (Development, Technical Testing) · Aulendorf (Sales Partner kraft Boxx GmbH)New on Amplifa

HRB 511285, District Court of JenaCommercial Register

3 sites in GermanySites

-65 °C to +120 °CPCM temperature range

over 30 PCM typesProduct portfolio

Storage sizes 300 – 140,000 litersComponent size

About Axiotherm

Axiotherm GmbH, based in Eisenberg/Thuringia, develops and produces phase change materials (PCM) and their macro-encapsulations for thermal energy storage. The portfolio comprises more than 30 organic (ATP) and inorganic (ATS) high-performance PCMs in a temperature range of -65 °C to +120 °C, including paraffins, salt hydrates and PCMs based on renewable raw materials; customer-specific melting temperatures are possible. Based on in-house plastic formulations, macro-encapsulations such as HeatSels® (water applications), HeatStaxx® (mobile heat storage) and HeatStaxx® Air (air-guided storage) are blow-molded. In addition, the company offers cooling elements (coolPacks) for pharmaceutical and food logistics, the PCM-polymer compound BlackIce® for the thermal stabilization of components, as well as application planning and technical testing. Reference projects include cold storage at the Futurium Berlin (50,000 liters, over 1 MWh) and sustainable cold storage for BioNTech vaccine transport. Axiotherm GmbH is a subsidiary of ESDA Technologie GmbH.

Site: Eisenberg/Thuringia
Processes: Blow molding of macro-encapsulations (HeatSel®) from developed plastics for water applications, Blow molding of macro-encapsulations (HeatStaxx®) for mobile heat storage, Blow molding of macro-encapsulations (HeatStaxx® Air) for air-guided heat and cold storage, Production and filling of cooling elements (coolPacks), standard sizes and custom-made – from, Development and production of phase change materials (PCM) in the temperature range -65°C to, Development of PCM-polymer compounds (BlackIce®) for the thermal stabilization of components, Application planning and system development for thermal energy storage (among others installation, Development of application-specific PCM (customer-specific melting temperatures)
Materials: Axiotherm PCM (organic, ATP, melting points 2°C to 78°C), Axiotherm PCM (inorganic, ATS, melting points -63°C to 115°C), Paraffins, Salt hydrates, PCMs based on renewable raw materials, PCM-polymer compound (BlackIce®, gel-like, leak-proof), PCM-water mixture (HeatSel® filling, e.g. cold storage Futurium), Plastic (blow-molded macro-encapsulations HeatSel®, HeatStaxx®)
Certificates: Validated pharmaceutical/food standards, RAL quality mark
Industries: Logistics and cold chains, Refrigeration technology, Industry & buildings, Mobile heat storage, Sector coupling, Pharmaceutical logistics

01
Engineering and development of application-specific PCM
02
Tool development
03
Blow molding of the macro-encapsulations
04
PCM filling
05
Technical testing
06
Application planning and system integration

Materials and Processes

ATP

Organic high-performance PCM

Paraffin-based phase change materials with melting points from 2 °C to 78 °C for cooling and heating applications.

ATS

Inorganic high-performance PCM

Salt hydrate-based PCMs with melting points from -63 °C to 115 °C for compact thermal storage.

NWR

PCMs based on renewable raw materials

Non-toxic, biodegradable phase change materials for sustainable applications.

BlackIce®

PCM-polymer compound

Gel-like, leak-proof compound for the thermal stabilization of components, especially batteries and electronics.

Blow-molded macro-encapsulations

Blow-molded capsules (HeatSel®, HeatStaxx®) made from plastics developed specifically for this purpose, with an optimized surface-to-mass ratio.

Sites

Eisenberg/Thuringia

Headquarters and production

Materials: Axiotherm PCM, plastics

Bad Saarow

Development and technical testing

Aulendorf

Sales Partner (kraft Boxx GmbH)

Products and Components

**HeatSel® macro-encapsulation**Blow molding · Refrigeration/air-conditioning technology

**HeatStaxx® Air**Blow molding · Air-conditioning technology

**coolPacks cooling element**Filling · Pharmaceutical/food logistics

**BlackIce® PCM-polymer compound**Engineering · Electromobility

**HeatStixx® retrofit element**PCM encapsulation · Building services

Inside the production

Axiotherm PCM – phase change materials from -65 °C to +120 °C

Industries

Logistics and cold chainsRefrigeration technologyIndustry & buildingsMobile heat storageSector couplingPharmaceutical logisticsAir-conditioning technologyElectromobilityAutomotiveAviationFoodElectromobility/Batteries

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Blow molding of macro-encapsulations (HeatSel®) from developed plastics for water applicationsPlastics	–	–	–	Storage sizes 300 liters (small – Storage sizes up to 140,000 liters	Plastics (specially developed plastics for
Blow molding of macro-encapsulations (HeatStaxx®) for mobile heat storagePlastics	–	–	–	–	Plastics (plastics developed for this purpose)
Blow molding of macro-encapsulations (HeatStaxx® Air) for air-guided heat and cold storagePlastics	–	–	–	–	Plastics (plastics developed for this purpose)
Production and filling of cooling elements (coolPacks), standard sizes and custom-made – fromPlastics	–	–	–	–	Axiotherm PCM (melting points in the positive and negative
Development and production of phase change materials (PCM) in the temperature range -65°C toEngineering	–	–	–	–	organic high-performance PCM (ATP), inorganic high-performance PCM (ATS), paraffins, salt hydrates, renewable raw materials
Development of PCM-polymer compounds (BlackIce®) for the thermal stabilization of componentsEngineering	–	–	–	–	phase change materials (PCM), polymer
Application planning and system development for thermal energy storage (among others installationEngineering	–	–	–	–	–

Additional services

Development of application-specific PCM (customer-specific melting temperatures)Application planningMacro-encapsulation (blow-molded plastic capsules)Cooling elements (standard and custom, incl. tool development and filling)Technical testingTool development

Reference customers

BioNTech (cold storage for vaccine transport)Futurium Berlin (cold storage installation)ESDA Technologie GmbH (subsidiary company; cooperation in the INNOspace Master as ESDA-Axiotherm

Quality and Certificates

Technical testing of the PCMs and macro-encapsulations takes place at the Bad Saarow site. Validated standards for temperature ranges such as 2–8 °C or < -60 °C are available for pharmaceutical and food applications.

Evidence	Eisenberg/Thuringia
Validated pharmaceutical/food standards
RAL quality mark

History

2017
Installation of five cold storage units at the Futurium Berlin with a total volume of 50,000 liters, over 55,000 HeatSels and a storage capacity of over 1 MWh.
2018
PCM application in the Smart Building project Futurium Berlin; report in TGA Fachplaner.
2019
Winner of the smarter E Award in the category "Smart Renewable Energy"; overall winner of the INNOspace Master with the PCM-polymer compound (as ESDA-Axiotherm GmbH).
2021
Development of sustainable cold storage for BioNTech vaccine transport without dry ice.