mrinalmani
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Hi!
I am designing a battery string stabilization circuit with 20 individual Lithium cells in series. The cells combine together give an output of nearly 80V.
The voltage of each individual cell needs to be monitored, so a resistor divider is needed for each tap-off.
To minimize leakage current, I am thinking to use resistors in the range of 500K to 1M Ohm. (Each divided voltage is then buffered with a precision amplifier with low bias current.)
Is 1Mohm high enough to take extra precautions? How high can I go without complicating things?
Many people are of the opinion of using multiple series resistors to make up a large value resistor instead of using one singe large resistor. (Example 2x 500Kohm in series rather than a single 1MOhm) Should I do the same?
Thanks
I am designing a battery string stabilization circuit with 20 individual Lithium cells in series. The cells combine together give an output of nearly 80V.
The voltage of each individual cell needs to be monitored, so a resistor divider is needed for each tap-off.
To minimize leakage current, I am thinking to use resistors in the range of 500K to 1M Ohm. (Each divided voltage is then buffered with a precision amplifier with low bias current.)
Is 1Mohm high enough to take extra precautions? How high can I go without complicating things?
Many people are of the opinion of using multiple series resistors to make up a large value resistor instead of using one singe large resistor. (Example 2x 500Kohm in series rather than a single 1MOhm) Should I do the same?
Thanks