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 Operating System Only
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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. 

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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