64
AMP20
M1
HD-A
Maximum Current Limit Tables
The max current tables in this section summarize the maximum recommended charge and discharge currents per
cell for continuous and pulse operations with respect to SOC and cell temperature. Although the cells are capable
of the listed currents and the actual limits for each application may be different depending on the battery pack
environment, design, the cell’s age and the immediate and long-term operating history of the cells.
No matter what the cell currents are, even if they are within the limits listed below, the
individual cell terminal voltage and surface temperature shall never go beyond the absolute
maximum voltage limits listed in the specifications tables.
Operating the cells up to the currents listed in the tables will cause heat to build within the cell. If the cell is not
cooled between cycles, the cell’s temperature may increase beyond the recommended maximum temperature
limit. The cells must be properly cooled with heat sinks, or time must be allowed between cycles in order to
maintain the proper temperature limits of the cell.
In addition, operating the cells up to the current limits listed in the tables may cause their capacity to degrade
faster than expected. In general, charge and discharge rates of 20A or less will yield the longest cycle life. Higher
rates of current will reduce the number of charge and discharge cycles that the cells will be able to perform.
Finally, because the cell’s internal resistance rises as the cell ages and is cycled; both its temperature and terminal
voltage will vary during its service life. Therefore as the cell ages, the allowable current limits will decrease below
those shown in the tables. The most reliable indications of safe operating conditions are terminal voltage and
surface temperature, which must be maintained below those listed in the specifications tables.
