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Characterization Equipment


Identification of crystalline phases and analysis of the microstructure of active materials and fabricated electrodes are carried out with X-Ray Diffractometer.

The characterization of the electrodes at different state of charge in the battery helps in the understanding of the reactions mechanisms occurring in the battery upon cycling.



Materials and fabricated electrodes are studied by Field emission scanning electron microscope. This technique allows determining the morphology, homogeneity and particle size of materials and electrodes. These features define the quality of the electrodes and their impact on the electrochemical performance once the electrodes are placed inside the battery.



The solid-liquid ratio of the slurries and therefore its viscosity determines the ability of the mixtures to be coated in both laboratory and the pilot plant scale.

The viscosity of the solutions is measured at different shear rates in the rheometer. This analysis allows understanding the feasibility of the slurries to be coated at different speed rates.

Peel test

The adhesion strength of the coated electrodes on the current collector is measured using the peel tester. 90° peel test is performed between two substrates bonded together with an adhesive. The adhesive itself takes the form of a thin layer between the two substrates such as the adhesive located on the underside of a piece of tape that has been placed against a steel plate.

The goal of a peel test is to determine the adhesive strength of the material or the strength of the adhesive bond between two materials. A minimum adhesion strength of the electrode to the current collectors is required for the different processing of the electrodes.


Dry room

Dry room with less than 1% of relative humidity (dew point of -50ºC and room temperature of 20ºC). The conditions of the dry room meet the requirements for the appropriate electrode manipulation and battery assembly with the aim of enhancing the electrochemical performance.


Battery Manufacturing Pilot Line

Slurry mixing

Anodic and cathodic active materials are mixed with the conductive carbon and binders in agreement with the quantities and procedures previously optimised on laboratory scale.

Our goal is to focus on aqueous based slurries in order to produce electrodes by low-cost and environmental friendly procedures.

Waterborne cathodic and anodic slurries are prepared by mechanical stirring using two planetary mixers in order to avoid the cross contamination.

Temperature and vacuum level can be controlled depending on the requirements on the fabrication procedures.

Electrode coating

Coating line equipped with 3 different coating heads:

Knife, slot die and commar bar that will be selected depending on the properties desired on the electrodes. Drying zone is divided in 3 zones (1m long each) where the temperature and the air flow can be controlled. Dried electrodes are deeply analysed in order to guarantee the homogeneity in thickness and mass loading wide and lengthwise.

The coater has special filters and sensors to be able to coat organic based slurries.

Electrode calendering

The density of the electrodes plays a key role in the electrochemical performance. In order to reach the suitable porosity, electrode rolls are compressed by passing through a continuous calender.

Electrode handling: cutting

Cutting of the electrodes is automatically performed by an electrode cutting die with the required dimensions where usually anodes are slightly larger than cathodes. Each cut electrode is checked by online quality monitoring with an accuracy of 100 micron or less of tolerance.

Cell assembly

Stacking winding machine operates by automatic handling and alignment of the electrodes, with a tolerance of micron scale using a hot pressing lamination step.

The automatic assembled stacks can comprise the suitable number of electrodes to obtain the targeted capacity (from 10 to 50 Ah).


Battery Testing Labs

New Battery Technologies Testing Lab

Temperature controlled room with more than 750 channels for coin cell and small pouch cell electrochemical testing.

Battery Testing Lab

One of the most complete battery testing and characterization laboratory in Europe. The main equipment is:

  1. +100 channels for large cell testing (up to 250A)
  2. +10 channels for module or LV Battery Pack testing (up to 100V and 20kW)
  3. 15 temperature chamber
  4. 1 climatic chamber for module testing (1m3)
  5. Adiabatic calorimetry
  6. Cell abuse test bench

The different types of tests that are executed in the laboratory can be classified into:

    1. Performance, to get the datasheet of the batteries.
    2. Characterization, to get the parameter of electro-thermal models of the batteries.
    3. Cycling and Calendar, to get the ageing models of the batteries.
    4. Safety, including over-charge, short-circuits, nail penetration, crush…
    5. Calorimetry and thermal runaway.
    6. Environmental, including thermal shock and vibration.
    7. Cell-in-the-Loop for BMS algorithm validation.

High Voltage Battery Testing Lab

Hig Voltage Battery Pack Testbench for functional test.

The main equipment is:

  1. 2 cyclers up to 800V and 500kW.
  2. 3 chillers for liquid thermal management of the battery packs.
  3. CAN data logger for BMS parameters
  4. I/O modules for temperature and voltage measurements.


Anticipating the increasing R&D needs from industry to remain competitive in electromobility and energy storage, CIDETEC Energy Storage will open a new facility in the framework of the Mubil Strategy, significantly expanding our capabilities.


New Battery Pack testing: Electrical, Thermal, Mechanical

Power Electronics

Powertrain & EV

Additive manufacturing / 3D

Laser welding