SS316 Battery Test Cell – 2-Electrode, 1/4″
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Reusable SS316 battery test cell for two-electrode measurements
The S4R 1/4″ two-electrode battery test cell is a reusable laboratory platform for controlled electrochemical evaluation of battery and electrode materials. It combines a rigid SS316 stainless-steel body, interchangeable metallic plungers, spring-assisted axial stack contact and direct electrical access through the plungers.
Because the cell body is electrically conductive, the metallic plungers must be isolated from it during assembly. In the standard S4R configuration, 0.05 mm PET/Mylar electrical-insulation films are used for this purpose and are supplied separately.
Designed for rigid, reusable electrochemical testing
A compact stainless-steel platform combining maintained stack contact, configurable metallic interfaces and controlled electrical isolation.
Rigid SS316 body
A mechanically robust two-port body providing a stable, reusable platform for repeated laboratory assembly and cycling experiments.
Maintained axial stack contact
An internal spring helps maintain mechanical and electrical contact across stacks up to 5 mm thick without claiming a calibrated pressure.
Selectable plunger materials
SS316, aluminium or titanium plungers can be selected according to the electrolyte, potential window and experimental protocol.
Defined electrical isolation
0.05 mm PET/Mylar films isolate the metallic plungers from the conductive body in the standard assembly.
SS316 stainless-steel construction for repeated laboratory use
The cell incorporates a Swagelok® 316 stainless-steel body component within an independently assembled S4R battery-test architecture. The metal body provides high mechanical rigidity, dimensional stability and a durable external structure for repeated assembly, disassembly and cleaning.
The nominal 1/4″ internal format provides a useful diameter of 1/4″ (6.35 mm) and is specified for electrodes up to Ø 6.3 mm. Unlike the PFA version, the body is electrically conductive; correct isolation of the metallic plungers from the body is therefore an essential part of the cell assembly.
Plunger isolation from the conductive body
The SS316 body is conductive. If a metallic plunger makes unintended electrical contact with the body, the intended two-terminal measurement geometry is compromised. The standard S4R assembly therefore uses a thin electrical-insulation film between each plunger assembly and the conductive body.
The specified film is 0.05 mm PET, commonly referred to as Mylar. The film is not supplied with the cell and should be installed intact, without folds, punctures or metal-to-metal bypass paths. Electrical isolation should be verified before measurement.
PET / Mylar
Polyester electrical-insulation film used in the standard S4R assembly.
0.05 mm
Required for the standard metallic-plunger configuration; supplied separately.
Interchangeable metallic plungers
The two plungers provide electrical contact to the electrochemical stack while also transmitting the mechanical load generated by the spring assembly. Their material therefore contributes to both current collection and the electrochemical boundary conditions of the experiment, and should be selected for the intended chemistry.
Spring-assisted axial stack contact
The internal spring applies a preload to the stack and helps maintain mechanical and electrical contact between the electrodes, separator or electrolyte layer and metallic interfaces as the assembly relaxes or changes dimension during testing.
Removable spacers set the working length of the assembly, allowing stack thicknesses up to 5 mm within this 1/4″ configuration. The spring provides contact maintenance; no calibrated pressure or spring-force value is specified for this cell.
SS316 compression nuts with PTFE ferrules
Each side uses a stainless-steel compression nut with a PTFE ferrule. Tightening the nut compresses the ferrule around the plunger, providing the mechanical seal while retaining the plunger at the position established during assembly.
Electrical connection and two-electrode geometry
Each metallic plunger contains a transverse Ø 2.0 mm connection port for standard 2 mm banana plugs, allowing direct connection to a potentiostat, battery cycler or impedance analyser using conventional laboratory leads. Both terminals remain accessible outside the sealed test volume.
In this two-electrode geometry, the two electrode terminals form the complete measurement circuit. The recorded voltage is the potential difference between the two external plungers and therefore represents the complete cell response rather than the independently resolved potential of either electrode.
This configuration is suited to two-terminal full-cell, half-cell, symmetric-cell and related measurements where the overall cell response is the quantity of interest.
Accessible assembly for repeated experiments
The assembly consists of a reusable SS316 body, compression hardware, two interchangeable plungers, PTFE ferrules, spring, adjustment spacers and the required insulation films. The cell can be disassembled to recover electrodes, inspect contact surfaces and clean the individual components between experiments.
Plunger material, stack thickness and compression arrangement can be changed while retaining the same nominal cell geometry. This supports comparative experimental series in which the principal hardware geometry remains constant from one test to the next.
For related test architectures, the 1/2″ SS316 two-electrode battery test cell provides a larger working format, the 1/4″ SS316 three-electrode battery test cell adds a third independently accessible contact, and the 1/4″ PFA two-electrode battery test cell provides an electrically insulating PFA body alternative.
Reference dimensions
The original S4R technical drawing is retained to preserve the detailed geometry of the assembled cell. The reference values below summarize the dimensions most relevant to installation and electrode selection.
Technical specifications
Reference data for the 1/4″ two-electrode SS316 battery test cell.
| Parameter | Specification |
|---|---|
| Cell type | Reusable SS316 battery test cell, two-electrode configuration |
| Nominal format | 1/4″ |
| Useful internal diameter | 1/4″ (6.35 mm nominal) |
| Recommended max. electrode diameter | Ø 6.3 mm |
| Maximum stack thickness | 5 mm |
| Maximum validated temperature | 100 °C |
| Body material | 316 stainless-steel body component (Swagelok®) |
| Compression nuts | 316 stainless steel |
| Ferrule material | PTFE |
| Plunger materials | SS316, aluminium or titanium, according to the selected configuration |
| Required electrical insulation | 0.05 mm PET / Mylar film between metallic plungers and conductive body; not included |
| Compression system | Internal spring with removable adjustment spacers; preload not calibrated |
| Electrical connection | Transverse Ø 2.0 mm port on each plunger, for standard 2 mm banana plugs |
| Overall dimensions | 86 mm length, 16.5 mm across hex nut corners |
| Approximate mass | 35 g |
| Construction | Fully disassemblable for sample loading, electrode recovery, cleaning and reconfiguration |
| Typical applications | Battery-material screening, full-cell and half-cell studies, symmetric-cell testing, cycling and impedance measurements |
Included components
Supplied as a complete reusable cell assembly according to the selected plunger configuration.
Selecting and operating this configuration
Why are insulation films required?
The body is electrically conductive, so the metallic plungers must remain isolated from it to preserve the intended two-terminal circuit. The standard S4R assembly uses 0.05 mm PET/Mylar insulation films, which are not included with the cell.
What is the maximum recommended electrode diameter?
The nominal internal format is 1/4″ (6.35 mm). The recommended maximum electrode diameter for this configuration is Ø 6.3 mm.
Is the stack pressure defined?
No calibrated pressure value is specified. The internal spring maintains axial contact across the stack, while spacers set the working length. The cell is not intended as a calibrated pressure fixture.
Which plunger materials are available?
SS316, aluminium and titanium are available. The appropriate material depends on the electrolyte, potential window and role of the metallic interface in the experiment.
What stack thickness can be assembled?
Stacks up to 5 mm can be accommodated in the validated configuration. The internal spring and spacer arrangement maintains contact within this geometric limit.
What is the validated operating temperature?
The maximum validated temperature for the complete cell assembly is 100 °C. The PET/Mylar insulation film and the chemical system under test must also be suitable for the intended operating temperature.
Before use
Reusable SS316 battery test cell for two-electrode measurements
The S4R 1/4″ two-electrode battery test cell is a reusable laboratory platform for controlled electrochemical evaluation of battery and electrode materials. It combines a rigid SS316 stainless-steel body, interchangeable metallic plungers, spring-assisted axial stack contact and direct electrical access through the plungers.
Because the cell body is electrically conductive, the metallic plungers must be isolated from it during assembly. In the standard S4R configuration, 0.05 mm PET/Mylar electrical-insulation films are used for this purpose and are supplied separately.
Designed for rigid, reusable electrochemical testing
A compact stainless-steel platform combining maintained stack contact, configurable metallic interfaces and controlled electrical isolation.
Rigid SS316 body
A mechanically robust two-port body providing a stable, reusable platform for repeated laboratory assembly and cycling experiments.
Maintained axial stack contact
An internal spring helps maintain mechanical and electrical contact across stacks up to 5 mm thick without claiming a calibrated pressure.
Selectable plunger materials
SS316, aluminium or titanium plungers can be selected according to the electrolyte, potential window and experimental protocol.
Defined electrical isolation
0.05 mm PET/Mylar films isolate the metallic plungers from the conductive body in the standard assembly.
SS316 stainless-steel construction for repeated laboratory use
The cell incorporates a Swagelok® 316 stainless-steel body component within an independently assembled S4R battery-test architecture. The metal body provides high mechanical rigidity, dimensional stability and a durable external structure for repeated assembly, disassembly and cleaning.
The nominal 1/4″ internal format provides a useful diameter of 1/4″ (6.35 mm) and is specified for electrodes up to Ø 6.3 mm. Unlike the PFA version, the body is electrically conductive; correct isolation of the metallic plungers from the body is therefore an essential part of the cell assembly.
Plunger isolation from the conductive body
The SS316 body is conductive. If a metallic plunger makes unintended electrical contact with the body, the intended two-terminal measurement geometry is compromised. The standard S4R assembly therefore uses a thin electrical-insulation film between each plunger assembly and the conductive body.
The specified film is 0.05 mm PET, commonly referred to as Mylar. The film is not supplied with the cell and should be installed intact, without folds, punctures or metal-to-metal bypass paths. Electrical isolation should be verified before measurement.
PET / Mylar
Polyester electrical-insulation film used in the standard S4R assembly.
0.05 mm
Required for the standard metallic-plunger configuration; supplied separately.
Interchangeable metallic plungers
The two plungers provide electrical contact to the electrochemical stack while also transmitting the mechanical load generated by the spring assembly. Their material therefore contributes to both current collection and the electrochemical boundary conditions of the experiment, and should be selected for the intended chemistry.
Spring-assisted axial stack contact
The internal spring applies a preload to the stack and helps maintain mechanical and electrical contact between the electrodes, separator or electrolyte layer and metallic interfaces as the assembly relaxes or changes dimension during testing.
Removable spacers set the working length of the assembly, allowing stack thicknesses up to 5 mm within this 1/4″ configuration. The spring provides contact maintenance; no calibrated pressure or spring-force value is specified for this cell.
SS316 compression nuts with PTFE ferrules
Each side uses a stainless-steel compression nut with a PTFE ferrule. Tightening the nut compresses the ferrule around the plunger, providing the mechanical seal while retaining the plunger at the position established during assembly.
Electrical connection and two-electrode geometry
Each metallic plunger contains a transverse Ø 2.0 mm connection port for standard 2 mm banana plugs, allowing direct connection to a potentiostat, battery cycler or impedance analyser using conventional laboratory leads. Both terminals remain accessible outside the sealed test volume.
In this two-electrode geometry, the two electrode terminals form the complete measurement circuit. The recorded voltage is the potential difference between the two external plungers and therefore represents the complete cell response rather than the independently resolved potential of either electrode.
This configuration is suited to two-terminal full-cell, half-cell, symmetric-cell and related measurements where the overall cell response is the quantity of interest.
Accessible assembly for repeated experiments
The assembly consists of a reusable SS316 body, compression hardware, two interchangeable plungers, PTFE ferrules, spring, adjustment spacers and the required insulation films. The cell can be disassembled to recover electrodes, inspect contact surfaces and clean the individual components between experiments.
Plunger material, stack thickness and compression arrangement can be changed while retaining the same nominal cell geometry. This supports comparative experimental series in which the principal hardware geometry remains constant from one test to the next.
For related test architectures, the 1/2″ SS316 two-electrode battery test cell provides a larger working format, the 1/4″ SS316 three-electrode battery test cell adds a third independently accessible contact, and the 1/4″ PFA two-electrode battery test cell provides an electrically insulating PFA body alternative.
Reference dimensions
The original S4R technical drawing is retained to preserve the detailed geometry of the assembled cell. The reference values below summarize the dimensions most relevant to installation and electrode selection.
Technical specifications
Reference data for the 1/4″ two-electrode SS316 battery test cell.
| Parameter | Specification |
|---|---|
| Cell type | Reusable SS316 battery test cell, two-electrode configuration |
| Nominal format | 1/4″ |
| Useful internal diameter | 1/4″ (6.35 mm nominal) |
| Recommended max. electrode diameter | Ø 6.3 mm |
| Maximum stack thickness | 5 mm |
| Maximum validated temperature | 100 °C |
| Body material | 316 stainless-steel body component (Swagelok®) |
| Compression nuts | 316 stainless steel |
| Ferrule material | PTFE |
| Plunger materials | SS316, aluminium or titanium, according to the selected configuration |
| Required electrical insulation | 0.05 mm PET / Mylar film between metallic plungers and conductive body; not included |
| Compression system | Internal spring with removable adjustment spacers; preload not calibrated |
| Electrical connection | Transverse Ø 2.0 mm port on each plunger, for standard 2 mm banana plugs |
| Overall dimensions | 86 mm length, 16.5 mm across hex nut corners |
| Approximate mass | 35 g |
| Construction | Fully disassemblable for sample loading, electrode recovery, cleaning and reconfiguration |
| Typical applications | Battery-material screening, full-cell and half-cell studies, symmetric-cell testing, cycling and impedance measurements |
Included components
Supplied as a complete reusable cell assembly according to the selected plunger configuration.
Selecting and operating this configuration
Why are insulation films required?
The body is electrically conductive, so the metallic plungers must remain isolated from it to preserve the intended two-terminal circuit. The standard S4R assembly uses 0.05 mm PET/Mylar insulation films, which are not included with the cell.
What is the maximum recommended electrode diameter?
The nominal internal format is 1/4″ (6.35 mm). The recommended maximum electrode diameter for this configuration is Ø 6.3 mm.
Is the stack pressure defined?
No calibrated pressure value is specified. The internal spring maintains axial contact across the stack, while spacers set the working length. The cell is not intended as a calibrated pressure fixture.
Which plunger materials are available?
SS316, aluminium and titanium are available. The appropriate material depends on the electrolyte, potential window and role of the metallic interface in the experiment.
What stack thickness can be assembled?
Stacks up to 5 mm can be accommodated in the validated configuration. The internal spring and spacer arrangement maintains contact within this geometric limit.
What is the validated operating temperature?
The maximum validated temperature for the complete cell assembly is 100 °C. The PET/Mylar insulation film and the chemical system under test must also be suitable for the intended operating temperature.
Before use
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