Agilent Technologies E4374A Cell Forming Example, 1. Test Outcome Flowchart, Function, Step, Time

5 - Programming Overview

Start STEP

Continue in step

Test outcome?

FALSE

TRUE

FAIL

Test action?

NEXT

Remove cell from

sequence

Go to NEXT step

Figure 5-1. Test Outcome Flowchart

Cell Forming Example

The following table documents a sequence consisting of four steps. Figure 5-2 illustrates how three of the cells behave as the sequence is running. Each step in the sequence is performed on all cells simultaneously. Sequence steps and actions are as follows. Refer to Chapter 7 for the C programming code for this example.

Function

Set Seq Step

Set Seq Test

Set Seq Test

Set Seq Step

Set Seq Step

Set Seq Test

Set Seq Test

Set Seq Test

Set Seq Step

Step

1

1

1

2

3

3

3

3

4

Step Action/ Test Type

Charge at

Voltage ≥

Current ≤

Rest

Discharge at

Voltage ≤

Voltage ≤

Voltage ≥

Rest

Voltage

4.2V

3.8V

3.0V

3.0V

3.0V

3.0V

Current

0.295 A

0.02A

0.295 A

Time

For 20 min.

Before 5 min.

After 5 min.

For 10 min.

For 15 min.

Before 5 min.

After 5 min.

At 15 min.

For 5 min.

Test Outcome

Fail (cell removed from sequence)

Next (cell goes to step 2, rest)

Fail (cell removed from sequence)

Next (cell goes to step 4, rest)

Fail (cell removed from sequence)

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