Im looking at building a dog collar project and I want to make sure to use a battery that would be safe from fire. Lithium is of course preferable for power, weight and rechargability but I am worried about it being punctured by another dog playing or some other way. I know many training collars us…

I know of no batteries that could be used for you application that are non-toxic unfortunately. You may want to run this by Www.Batteryspace.com

The best you can do is put the battery in a case that provides some protection from being chewed - that would apply to all the electronics.

My plan is, of course, to use an enclosure for the entire project. I suppose my goal here was to find out if there were any particular batteries that were more fragile than others and which would be best. I see Adafruit has 18650 batteries with JST connectors. I thought maybe that would be a better …

[image] docwisdom: I see Adafruit has 18650 batteries with JST connectors. I thought maybe that would be a better option than the Lithium polymer foil pack style. I don't know if a 3.7V cylindrical cell is (or isn't) the best choice for this application, but I would agree with you that it is …

All batteries are densely packed energy made from hazardous chemicals. Primary Lithium-thionyl chloride cells are commonly used in animal tracking due to high energy density, wide temperature range, and relative safely from accidental discharge.

Thanks Jack. A quick google search tells me that LiSOCl2 are not rechargeable. So that would probably be out for my project given the usage. Research on LiFePO4 seems promising as far as safety goes. Thoughts?

[image] docwisdom: Research on LiFePO4 seems promising as far as safety goes. Thoughts? Be aware that the Particle device will always think it's recharging a 3.7 V nominal Li-On type battery. LiFePO4 is 3.2V. You would need to make sure the Particle never attempted to re-charge the LiFePO4 …

Agreed, that was a consideration. I have found this nifty charger for LiFe [image] LiFePO4wered/USB by Silicognition LLC on Tindie A complete USB chargeable 3.3V power system on a module Price: USD 13.95

X[quote=“docwisdom, post:7, topic:53373”] LiFePO4 seems promising as far as safety goes. [/quote] LiFePo4 cells are the safest lithium battery out there but they are still full of chemicals that would probably kill a dog. You would need a custom charging + boost converter chip for charging this …

Pet safe batteries

Hardware

Blaszki November 21, 2019, 8:27am 11

Maybe electrostatic double-layer supercapacitors will be more safety than electrochemical capacitors/battery, of course they have less capacitance than battery

How to use a “super” capacitor

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Pet safe batteries

How to use a “super” capacitor

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