Questions & Answers

How can we help you?

Many of our customers ask similar questions. We have grouped these questions here and explain how everything works. Your question might appear here too.

About Commeo

What distinguishes Commeo from other battery system manufacturers?
  • High energy & power density
  • Maximum scalability
  • 100% industry standard
  • Battery 4.0: remote monitoring & smart maintenance
  • Open interface for communication with inverters, energy management systems (EMS) and chargers
  • Simple, safe installation

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Are Commeo battery systems also used in the private sector (home storage systems)?

No. Commeo battery storage systems have been specifically developed for industrial applications. Industrial storage systems have placed considerably higher demands on charging and discharging rates. Used as home storage systems, the Commeo energy storage block would simply be underutilised!

You can find some of the applications for which the Commeo battery system was developed here:

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Where are the Commeo energy storage blocks produced?

Commeo products are produced and developed in Wallenhorst, which is near Osnabrück. The majority of the individual components are also manufactured in Germany and Europe. In addition, Commeo has several components processed in the workshops of Heilpädagogische Hilfe Osnabrück e.V. (an organisation that provides special education in Osnabrück).

What is Commeo's position on lithium-ion batteries and environmental protection?

This topic can be considered from two points of view. On the one hand, lithium-ion batteries can help protect the environment by using them for the temporary storage of the energy generated by photovoltaic and wind power plants. This means they do not have to run “empty” when the grid capacity is overloaded, and can no longer absorb any more electricity. On the other hand, the Commeo energy storage blocks have been developed in a way that usually allows them to be dismantled into their individual component materials, therefore greatly simplifying the recycling of the individual components. Commeo will also play an active role in optimising Made in Germany cell technologies in the battery cell research factory.

Safety

Why are Commeo battery systems safe

When handled correctly, Commeo battery systems are not dangerous.
Commeo has implemented a multi-level, redundant security system in the energy storage blocks and systems. Due

  • to a robust aluminium housing
  • a relay
  • a safety fuse
  • an intelligent battery management system (BMS) that Commeo developed itself and which monitors temperature, voltage and other safety-relevant parameters and counteracts them if necessary
  • a control unit

and other features relevant to safety, Commeo products are state-of-the-art.

Our team will be happy to answer any questions you may have:

Contact us

Which standards and directives do Commeo battery systems comply with?
  • Functional safety:
    DIN EN ISO 13849-1:2016-06
  • Battery safety:
    DIN EN 62619:2017-11
  • Electrical safety:
    DIN EN 61010-1:2011-07
  • Transport safety:
    UN38.3 rev. 6
  • Low voltage directive:
    2014/35/EU
  • EMC directive:
    2014/30/EU
Are Commeo battery systems safe to touch?

All fully assembled Commeo energy storage systems, along with the individual energy storage blocks, feature full touch protection.

You will find other standards and directives that our products comply with in our product brochures:

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Which IP protection ratings do Commeo battery systems feature?

The Commeo energy storage block, along with the Commeo energy storage cabinet, feature protection class IP20 when set up as a free-standing system. However, the Commeo energy storage rack can also achieve higher protection ratings with the corresponding standard accessories.
Talk to us and we will develop a concept for your specific requirements.

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Technical details

How does the wiring of the energy storage blocks work?

The Commeo energy storage blocks have standardised external dimensions and interfaces. The battery cells inside the blocks, however, can be interconnected in a number of different ways and different conductivities can be achieved. As a result, the Commeo modular system contains blocks designed for both parallel and serial connection. In addition, the cell chemistry of the energy storage block can also be tailored to customer requirements. This provides the energy storage blocks with a unique modular design and plug-in capabilities. Depending on the application requirements, the energy content, capacity, number of cycles and voltage level of the battery system can be flexibly adjusted.

Connection options for the Commeo energy storage blocks:

Which voltage ranges do Commeo battery storage units cover?

The Commeo battery systems can be individually configured between a nominal voltage of 48 V and 800 V.

You can find all technical data in our brochures and technical data sheets, or you can assemble your system directly with our configurator:

To our configurator

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How are Commeo battery systems earthed?

The insulation is precisely matched so that the battery system itself does not need to be earthed. The standard industrial cabinet is earthed, as usual in the switch cabinet design.

Is there a higher-level battery management system (BMS)?

Each Commeo battery system features a higher-level control unit that processes and consolidates the information from all energy storage blocks and makes it available to downstream system components (EMS, inverters, etc.). This makes it possible to monitor and check the condition of the entire battery system at any time.

How does a Commeo battery system communicate with external/connected devices?

48 V systems:
The Commeo ccu48V control unit offers a CAN bus and an Ethernet interface that provides the status information of the battery system. In addition, some chargers can be controlled directly from the control unit.

High-voltage systems:
The Commeo ccuHV control unit also features a Battery Disconnect Unit (BDU), which disconnects the load contacts in case of a fault.

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At what C rates can Commeo battery stores be charged and discharged?

Commeo batteries can be continuously discharged from 2C to 3C and continuously charged from 0.5C to 1C, depending on the selected cell chemistry.

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Glossary

SoC

State of Charge = how “full the battery is (in %)

The SoC describes the charge state of a cell or battery. It is calculated using algorithms and is defined as the quotient of the currently available residual discharge capacity and the maximum available residual discharge capacity at the upper operating voltage limit.

SoH

State of Health (in %)

Battery cells age over time and cycles. This process can be faster or slower depending on ambient conditions and cell load. The ageing process results in lower usable capacity. The SoH is defined as the quotient of the maximum available residual discharge capacity at the upper operating voltage limit and the nominal discharge capacity.

DoD

Depth of Discharge (in %)

The Depth of Discharge describes a battery’s depth of discharge.
The Commeo energy storage blocks have a maximum possible DoD of 100%.

SoP

State of Power = available charging and discharging capacity

The SoP describes the available charging and discharging capacity of the battery system taking into account the present current, temperature and other conditions.

NMC

Nickel manganese cobalt oxide

This is the electrochemically active cathode material inside the lithium-ion cell. The name of the cathode or anode material is usually used to distinguish the different lithium-ion cell chemistries. The NMC variant combines high energy density, high performance and long service life. These three and many other parameters vary according to cell chemistry.

Another variant of the lithium-ion cell would be iron phosphate (LFP), for example.

C rate

The C rate describes how quickly a battery can be discharged. The higher the value, the faster the battery can be completely discharged.

At a C rate of 1C, for example, the battery is completely discharged in one hour. At 0.5C, it takes twice as long (2 hours), and at 2C it only takes half as long (½ hour).

Full cycle

A full cycle of a battery describes its complete charging and discharging with 100% depth of discharge. Partial discharges or partial charges are combined into full cycles using algorithms.

Dipl.-Ing. (FH)
Michael Schnakenberg
Geschäftsführer
Commeo GmbH
Otto-Lilienthal-Straße 8
49134 Wallenhorst, Germany

p +49 5407 81381-0
f +49 5407 81381-99

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