Fuel Gauge IC for Primary Cell Charge Monitoring

Projects General Guidance
1

I want to use a fuel gauge IC for charge monitoring a primary battery (either lithium manganese dioxide or lithium thionyl chloride) in my wireless sensor node project. The goal is to power the sensor using a primary battery for 10 years without replacement.

I would like to ask whether the following fuel gauge ICs, which are primarily designed for Li-ion cells, are suitable for monitoring primary battery charge:

  1. LTC2941 / LTC2942
  2. MAX17201 / MAX17205 / MAX17215

I am aware that TI’s BQ35100 and Analog Devices’ LTC3337 are specifically designed for primary batteries. However, I’m interested in exploring the LTC2941/LTC2942 due to their smaller size.

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This is the image that i found on the digikey website. As it can seen a coin cell (primary) battery is connected to the LTC2942.

2

The way one of us would get the answer is by reading the datasheet. The way we find datasheets is with Google.

1 Like
3

Interesting, the parts you mentioned work with I2C which generally requires a processor to read/write/program them. With a 10 year life requirement what processor are you planning on using?

4

MGM240 zigbee module (microcontroller with 2.4Ghz wireless communication capability)

5

What battery have you chosen? How will you control the current usage.