Typical applications
Understanding the mechanical behaviour of battery cells during cycling is a critical factor. If mechanical characteristics are not taken into account, battery research can end up with irreproducible results and, even worse, with issues when trying to transfer the obtained results to the module and pack level. Typical applications with the advanced pouch cell testing fixture ComprePouch are:
Cycling of pouch cells at spring-loaded stack-pressure, mimicking flexible
installation situationsCycling of pouch cells at pseudo-fixed volume, mimicking constrained
installation situations2D pressure mapping while cycling at different conditions
Quantifying pouch cell breathing and swelling during cycling
Improving reproducibility by well-controlled measurement conditions
Selected views and impressions
Detailed Description
The ComprePouch is a cell fixture that enables electrochemical tests of batteries in a pouch cell format at different stack-pressure conditions. It allows for switching between pseudo-constant volume and spring-loaded pressure conditions. As an option it integrates a force sensor, that shows the applied force on an attached display and/or a connected PC. Further options include precise in-situ thickness measurements allowing for a cell breathing and swelling analysis in the spring-loaded mode.
Force is applied by four nuts compressing tension springs. Force is transferred through massive, guided metal plates, and optionally a force sensor, to your sample. The springs can easily be exchanged by ones with different rates, or by stiff cylinders.
The measured force can be shown on a display and/or monitored and stored via a connected PC. You can use all data handling and plotting features that our CompreDriveControl Software offers. The sample temperature can be controlled by placing the ComprePouch inside a temperature chamber.
Technical Details
- Maximum sample dimensions:
120 mm x 110 mm x 20 mm
- Maximum force:
Fmax = 25 kN
- Temperature range during operation (ComprePouch):
Toperation = -30 °C to +90 °C
Toperation, LVDT = -20 °C to +85 °C
- Temperature during operation (electronics + accessories):
Toperation, electronics = +10 °C to +40 °C
- Maximum measurement potential:
Umax = 40 Vac/dc
- Maximum measurement current:
Imax = 5 A, when using integrated tab connection
- Rated dimensions:
ComprePouch – 189 mm x 146 mm x 173 mm
Force monitoring electronics – 140 mm x 106 mm x 60 mm
- Total weight:
ComprePouch – 4.6 kg
ComprePouch with accessories (excl. LVDT sensors) – 4.9 kg
- Relative humidity (RH) for working and storage area:
(non-condensing) 0 to 80% RH
- 3 Sets of 4 springs with different spring rates:
Type Soft – Colour Purple – Spring rate = 32.3 N/mm – Max. allowed total force (with 4 springs) = 3.3 kN
Type Medium – Colour Red – Spring rate = 272.0 N/mm – Max. allowed total force (with 4 springs) = 16.6 kN
Type Hard – Colour Bronze -Spring rate = 1.150 N/mm – Max. allowed total force (with 4 springs) = 25.0 kN (limited by frame)
Key Data
- Art. No.:
840117xxx
- Essential features at a glance:
- High quality setup for testing pouch cells
- Different spring packages available to switch between pseudo-constant volume and spring-loaded mode (pseudo-constant pressure)
- Option to follow thickness changes
- Large range of applicable force up to 25 kN
- Large range of sample temperature from -30 °C up to 90 °C (in climate chamber)
- Universal compatibility with all potentiostats/galvanostats/battery cyclers
