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Compliant Pads Between AMP20 Cells
To maintain proper cell support and account for expansion during the charge and discharge cycles, A123 uses a
compliant pad between cells. The compliant separator is chosen to maintain the pressure range of 4 – 18 psi
against the cell’s surface. By way of example, Figure 9 shows how much pressure is exerted by a 1.19 mm
compliant pad of a certain durometer which may be used between the AMP20 cells. Using this chart, one can
choose the initial deflection (16%) such that the regular expansion of the cell during its cycling keeps the pressure
between 4 and 18 psi.
Figure 9 – Graph of the pressure vs. deflection of an example compliant pad for AMP20 Cells
NOTE:
In that each pack design will be different, the deflection parameters need to be calculated independently
for each. The data shown in Figure 9 is just an example of one particular compliant pad.
Operating Range with
1% cell expansion
Starting Deflection @
50% SOC at the cell’s
beginning of Life
