Potentiostat - Galvanostat - Supercapacitor/Battery Tester
Goal: Develop affordable instrument capable of performing various electrochemical measurements where high accuracy and extremely low currents are not required.
Overview
Potentiostat/galvanostat is an instrument capable of maintaining constant (or programmed) voltage/current in three electrode electrochemical cell. Using containing programmable voltage/current source for supercapacitor and battery testing is just a matter of software.
Instrument under development will contain eight independent channels capable of generating and measuring voltage up to ±10V and current up to ±2.5A.
Target specifications:
General:
| Number of channels: | 8 |
| Control unit: | Embedded (single board) PC, Windows 10 IoT Enterprise |
| Communication Internal: External: |
Ethernet 100BASE-TX Ethernet 100BASE-TX, 1000BASE-T, IEEE 802.11 (wireless) |
| Channel controller: | AVR XMEGA Microcontroller + ENC424J600 Ethernet Controller Standardized interface - analog electronics and software determines channel functionality |
Applications:
| Electrochemistry: | Cyclic voltammetry Linear sweep voltammetry Chronopotentiometry Chronoamperometry Corrosion Measurements |
| Supercapacitor testing: |
Testing according to norm IEC 62576:2009:
|
| Battery testing: | Constant current - constant voltage charging and
constant current
discharging Battery cycling |
Channel 10V_2.5A:
| Voltage range: | ±10V |
| Current ranges: | ±2.5A ±250mA ±25mA ±2.5mA |
| Voltage setting resolution: | 5mV (12 bit) |
| Voltage measurement resolution: | 300µV (16 bit) |
| Current setting resolution: | ±2.5A: 1.2mA (12-bit) ±250mA: 120µA (12-bit) ±25mA: 12µA (12-bit) ±2.5mA: 1.2µA (12-bit) |
| Current measurement resolution: | ±2.5A: 76µA (16-bit) ±250mA: 7.6µA (16-bit) ±25mA: 760nA (16-bit) ±2.5mA: 76nA (16-bit) |
| Sampling rate: | 100 mHz - 1 kHz (up to 100 kHz with 12-bit measurement resolution) |
| Accuracy: | 0.25% |