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EIS Box

Make impedance measurements on up to eight batteries

The EIS Box is a multiplexed eight channel instrument designed for impedance measurements on batteries (or other devices such as supercapacitors or fuel cells) and is typically used in conjunction with a battery cycler.  The EIS Box is isolated from ground and is capable of EIS from 100 kHz down to 10 µHz and comes in a 3U 19" rack-mountable chassis. The EIS Box comes in two versions, the EIS Box 5000 or the EIS Box 1010. 

  • EIS on up to eight cells sequentially
  • 10 µHz to 100 kHz*
  • Includes 3 m cables
  • Ethernet or USB based
*Specifications subject to change
*For Windows 10 & 11 Operating System Only
*Not compatible with Virtual Front Panel or Electrochemical Signal Analyzer software packages
*Compatible with techniques within Electrochemical Energy software package, excluding cyclic voltammetry
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EIS Box Highlights

The EIS Box comes with eight 3 m cell cables and is designed to be used in conjunction with a battery tester/cycler to provide impedance testing. Cycle testing of the battery would be provided by the battery tester/cycler. It can be installed in a 19-inch rack (similar to the ECM8 multiplexer). Connection to the EIS Box is made through ethernet or USB. As with a USB connection to our potentiostats, the EIS Box has to be in constant contact with the host computer for experiments to be performed successfully. Connection via ethernet is done via a direct connection to the computer or over a local network only; connection over the internet is not possible.  

Though the EIS Box was designed for single cell measurements of individual cells, it can measure voltages within a stack of cells. Each EIS Box channel can measure a +/- 5V cell whose maximum voltage does not exceed 26V versus ground. Additionally, the EIS Box cannot measure more than 26V total in a stack. For example, if you had eight or more 4.2V cells in a stack, the EIS Box cannot measure more than the first six in that stack. Please contact us if you need further explanation for this special application. 

Accuracy Contour Plot

The Accuracy Contour Plot shown below provides a detailed look at the performance you can expect from the EIS Box 5000 in real-world situations. 

 

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Specifications

EIS BOX SPECIFICATIONS
Cell Connections Four
Number of Cells Up to Eight
Cables Set of Current and Sense Cables – 3 m standard length
DC Power Input Voltage  100-240, 50-60 Hz, 2.1A
Connection to computer Ethernet or USB
EIS Measurement 10 uHz to 100 kHz 
Max AC Amplitude

3 V or 5 A (EIS Box 5000) // 3 V or 1 A (EIS Box 1010)
Accuracy See Accuracy Contour Plot
Weight Approximately 25 lb (10 kg)
Dimensions

5.25”x18.875”x18.875” (13.3 cm H x 41.5 cm W x 45.7cm D)
Power Max 120W
Mounting

Fits 19” (48.3 cm) standard rack mount
3 U height
Fuses

IEC 127
For 115 VAC, use 6.3 A 250 V
For 230 VAC, use 3.153 A 250 V

CONTROL AMPLIFIER
Compliance Voltage Min. ±6.5 V (EIS Box 5000) // Min. ±22 V (EIS Box 1010)
Output Current Min. ±5 A (EIS Box 5000) // Min. ±1 A (EIS Box 1010)
Unity Gain Bandwidth 1050, 250, 43, 4.4, 0.5 kHz (EIS Box 5000) // 1100, 320, 39, 4, 0.4 kHz (EIS Box 1010)
Slew Rate 10, 4.4, 0.7, 0.07, 0.007 V/µs (EIS Box 5000) // 10, 4.5, 0.6, 0.06, 0.006 V/µs (EIS Box 1010)
   

DIFFERENTIAL ELECTROMETER
Max Input Voltage

Max ±6.0 V (EIS Box 5000) // Max ±12 V (EIS Box 1010)
Input Current Max 25 pA

Input Resistance

Differential (between inputs)
Common Mode (input to ground)

 

10 TΩ (EIS Box 5000) // 20 TΩ (EIS Box 1010)
1 TΩ

Input Capacitance 

Differential (between inputs)
Common Mode (input to ground)

 

8 pF (EIS Box 5000) // 0.3 pF (EIS Box 1010
12pF

Bandwidth (–3 dB)

 Min 12 MHz (EIS Box 5000) // Min 15 MHz (EIS Box 1010)

 CMRR

DC to 10 kHz
10 kHz to 100 kHz

 

98 dB (EIS Box 5000) // 86 dB (EIS Box 1010)
88 dB (EIS Box 5000) // 60 dB (EIS Box 1010)
   

VOLTAGE MEASUREMENT
A/D Full Scale Ranges

±6.5536 V (EIS Box 5000) // ±12.0 V, ±3.0 V (EIS Box 1010)
Resolution (before gains) 200 µV/bit (EIS Box 5000) // 400 µV/bit, 100 µV/bit (EIS Box 1010)

Zero Offset Error

0.5 mV (EIS Box 5000) // 1.0 mV (EIS Box 1010)

Gain Error

0.2% (EIS Box 5000) // 0.3% (EIS Box 1010

Offset Range

±6.5536 V (EIS Box 5000) // ±3.2768 V, ±13.1072 V (EIS Box 1010)

 Post-offset Gain

  1×, 10×, 100×
   

CURRENT TO VOLTAGE CONVERTER
Maximum Full-scale Range

±5 A (EIS Box 5000) // ±1 A (EIS Box 1010)
Minimum Full-scale Range

±50 µA (EIS Box 5000) // ±10 nA (EIS Box 1010)
±500 (after 100× gain) nA // ±100 pA (EIS Box 1010)

Voltage across Rm

±100 mV at full scale

 Input Offset Current

  Max 25 pA (EIS Box 5000) // Max 10 pA (EIS Box 1010)

Range Zero Offset

 Max 0.05% of range

Gain Tolerance

 Max 0.2% of reading (EIS Box 5000) // Max of 0.3% of reading (EIS Box 1010)

CURRENT MEASUREMENT
Resolution

0.00333…% FS/bit
Offset Range

±100% of range

Post-offset Gain

1×, 10×, 100×

Accuracy

Dominated by current-to-voltage error
(see above)

 

  

ENVIRONMENTAL
Operating Temperature Range 

 0 to +45°C
Relative Humidity  Max 90% (non-condensing)

Storage and Shipping Temperature

–25 to +75°C

Maximum Shipping Acceleration 

 30g 

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