Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
(OP)
Hello,
I am working on a product that runs off 1 AAA battery. There is no charger in it and the user will be replacing the battery anywhere between every use and every 10 uses.
My goal is to give an accurate indication of how much charge is remaining or at least steps of 25%. I worry that might not be feasible since users can insert any type of AAA at any charge level.
I've looked at various fuel gauge ICs but I'm not sure if they can handle a battery being inserted when half charged.
Am I asking for too much or does this sound possible?
Thanks.
I am working on a product that runs off 1 AAA battery. There is no charger in it and the user will be replacing the battery anywhere between every use and every 10 uses.
My goal is to give an accurate indication of how much charge is remaining or at least steps of 25%. I worry that might not be feasible since users can insert any type of AAA at any charge level.
I've looked at various fuel gauge ICs but I'm not sure if they can handle a battery being inserted when half charged.
Am I asking for too much or does this sound possible?
Thanks.
RE: Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
Alkali batteries have a dependable voltage drop with SOC. (State Of Charge)
You the designer have to understand what that means under your product's loading on the battery.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
Is there any way to determine battery chemistry through measurements?
RE: Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
Go to Digikey.com I suggest them because they have a good search engine and accurate data base.
Select: Product Index > Integrated Circuits (ICs) > PMIC - Battery Management
There are almost 4,000 parts in this category.
Check the 'In Stock' box. No use looking for devices that aren't popular.
Under 'Part Status' select 'Active'. No use looking for obsolete parts.
Under 'Battery Chemistry' select 'Multi-Chemistry' This will get you ICs that among other things at least support alkaline cells. Also, I didn't see a direct selection for 'Alkaline' or 'carbon zinc'.
Begin looking at data sheets. This will help you better understand what features are available, which vendors may be making devices more like what you need, and help you understand the features.
RE: Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
Have you seen any ICs or methods to measure SOC for unknown AAA chemistry that can be inserted at any SOC?
RE: Battery Charge Remaining (Fuel Gauge) for Various Replaceable AAA
The problem with estimates of percent consumption is that it doesn't tell anything useful about how long a cell will last.