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Exploring Battery Cell Surge Tester

Battery Cell Surge Tester-Chroma 19311

Battery Cell Surge Tester

Chroma 19311

Designed for testing the insulation quality between the positive and negative plates of a lead-acid battery cell

Output Voltage, Step

0.10 kV~6.00 kV, 0.01 kV

Test Voltage

≥ 3.00kV @ 50nF

Sampling Rate

200MHz

The 19311-10 has 10 channels, which can test up to 9 battery cells via scanning test, with a single unit. It can support up to 25 channels for testing up to 24 cells in a sequence by connecting with an external scanner (A190362). The test speed of the multicell scanning test by 19311-10 is extremely efficient, saving test time, and decreasing labor costs. It also increases the production capacity of the production line.

Equivalent Circuit Diagram


The surge test applies a "non-destructive", short period and low energy impulse voltage on a lead-acid battery cell. During the surge test, the lead-acid battery cell resonates with the internal inductor because there is an internal inductor in the 19311/19311-10. The 19311/19311-10 can judge if the lead acid battery cell is a good cell or not by analyzing the resonant waveform or comparing the test waveform with the sample waveform. The main purposes of testing the lead-acid battery cell by a high voltage surge test before the electrolyte injection are checking whether the insulation distance between the positive and negative plates is enough, checking whether the insulation quality between the positive and negative plates is good, checking whether the separator between the positive and negative plates exists, and checking whether the positive and negative plates are not short together.


Test Waveform Diagram


Detecting the defect battery cell before the electrolyte injection can decrease the defective rate of the lead-acid battery production. After the switch turns off, the decrease of the peak voltage represents the insulation quality of the battery cell.

Chroma 19311 series can analyze the differences of the insulation quality from the resonant waveform. There are 8 types of judgements for analysis: Area, Diff-Area, Flutter, Laplacian, V1, V3, Peak Ratio and ΔPeak%.


Area, which is comparing the difference of the total area between the test waveform and the sample waveform, can be used to check whether or not the insulation between the positive and negative plates is poor or whether or not the separator exists between the positive and negative plates. Area represents the insulation status of the lead-acid battery cell.


Differential Area, which compares the area created between the test waveform and the sample waveform with the total area of the sample waveform, can be used to check the difference of the battery cell’s capacitance.


Flutter, which is a total value of the waveform that is calculated by using the 1st derivative of differential equation, can be used to do the contact check. When the probe does not contact to the battery cell, the capacitance is much smaller than the capacitance with a good contact, so the resonant frequency becomes very high after the switch turns off, which causes the value of Flutter to become larger.


Laplacian, which is calculated by using the 2nd derivative of differential equation, can be used to check the occurrence of the small discharge. It can detect the rapid changes in the test waveform caused by the small discharge during the surge test.


V1 is the 1st peak voltage of the resonant waveform. When the insulation is poor or the separator does not exist between the positive and negative plates, if the electric field intensity/voltage is high enough, the discharge occurs.


V3 is the 3rd peak voltage of the resonant waveform. When the insulation is poor or the separator does not exist between the positive and negative plates, if the electric field intensity/voltage is high enough, the discharge occurs. This energy released causes the 3rd peak voltage (V3) to be smaller than the good battery cell.


Peak Ratio, which is the ratio between the 5th peak voltage (V5) and the 3rd peak voltage (V3) of the waveform, can be used to check the insulation quality between the positive and negative plates of the lead-acid battery cell. When the insulation quality is worse or the parallel resistance (Rp) is less, because the energy loss is more, the voltage of the 5th peak voltage becomes smaller.


ΔPeak% can be used to check whether or not the insulation quality between the positive and negative plates of the lead-acid battery cell is close to the golden sample. ΔPeak% is the difference of the peak ratio between the test waveform and the sample waveform. This can be used to sort out the battery cell whose insulation quality is not close to the golden sample.

Model Description
19311 Battery Cell Surge Tester
19311-10 Battery Cell Surge Tester (10 channels)
A190362 16-channel 4-wire HV External Scanning Box
A190364 4-wire test cable with bare wire (1.5m)
A190365 4-wire test cable with bare wire (3m)

More Features

Support Up to 25 Channels for Scanning Test

Graphical
Color Display

Support USB for Storing Waveform & Screen Capture

LAN, USB, and
RS232 Interfaces

Media

19311 Battery Cell Surge Tester Key Features and Benefits

This is a brief presentation detailing some of the key features and benefits of Chroma’s 19311 Battery Cell Surge Tester.

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