How to monitor the remaining energy in a Lithium based battery
How to monitor the remaining energy in a Lithium based battery
(OP)
Hello,
I am working on wireles sensor networks topic and I need to monitor the battery level of my sensor nodes in the network. However, as far as I know, lithium based batteries have a flat voltage over time curve, so it is not possible to simply measure the voltage of the battery output. Am I correct?
My sensor nodes are low capacity ones and they dont (and most probably they cannot) have any hardware mechanism attached to them to monitor the battery. What I need to know is to detect whether the battery level of a node is in a critical situation or not. Is it possible to do it without adding any additional hardware?
Regards,
Cagri
I am working on wireles sensor networks topic and I need to monitor the battery level of my sensor nodes in the network. However, as far as I know, lithium based batteries have a flat voltage over time curve, so it is not possible to simply measure the voltage of the battery output. Am I correct?
My sensor nodes are low capacity ones and they dont (and most probably they cannot) have any hardware mechanism attached to them to monitor the battery. What I need to know is to detect whether the battery level of a node is in a critical situation or not. Is it possible to do it without adding any additional hardware?
Regards,
Cagri





RE: How to monitor the remaining energy in a Lithium based battery
Lithium batteries nominally have 3V at the start. According to Duracell's Li battery bulletin, they are essentially completely discharged at a 2V output, so 2.5V might be a good stopping point. According to the curves in the bulletin, 2.5V would put you at about 90% of capacity.
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RE: How to monitor the remaining energy in a Lithium based battery