- #1
Electronics Calculating Resistor Size for 3V Battery
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SUMMARY
This discussion focuses on calculating the appropriate resistor size for charging a 3V battery. A 5.1V Zener diode is not suitable for this application due to safety concerns. Instead, a 35Ω, 50W resistor is recommended for outdoor use, with caution advised to avoid damage to the battery and surrounding environment. The conversation emphasizes the complexity of battery charging, which varies by chemistry, and suggests consulting resources like Battery University for further information.
PREREQUISITES- Understanding of resistor values and power ratings
- Familiarity with battery charging principles
- Knowledge of Zener diode functionality
- Awareness of battery chemistries and their charging requirements
- Research the specifications and applications of 3-terminal linear regulators
- Learn about safe practices for charging different battery chemistries
- Explore the implications of using Zener diodes in voltage regulation
- Visit Battery University for comprehensive battery management resources
Electronics enthusiasts, hobbyists working with batteries, and engineers involved in battery management systems will benefit from this discussion.
- #2
berkeman
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You cannot use a 5.1V Zener diode in a regulator for charging a 3V battery...
And Zener regulators are pretty sloppy anyway -- in general it's a lot better to just use a 3-terminal linear regulator. And battery charging can be a fairly complicated matter, depending on which battery chemistry you are working with...
And Zener regulators are pretty sloppy anyway -- in general it's a lot better to just use a 3-terminal linear regulator. And battery charging can be a fairly complicated matter, depending on which battery chemistry you are working with...
- #3
Tom.G
Science Advisor
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@John1397, As berkeman stated...
If you really insist on this approach, do it out doors, nothing around that you want to keep (like people, animals, or houses), and don't mind destroying a battery, then a 35Ω, 50Watt resistor would be about right.
Oh, and stay up-wind of it.
I really recommend that you take heed of the approach by @berkeman though.
That said, here is a sight with a great amount of information about batteries and how to charge and use them: https://batteryuniversity.com
Cheers,
Tom
Since you didn't give many details, here is the scenario:berkeman said:
If you really insist on this approach, do it out doors, nothing around that you want to keep (like people, animals, or houses), and don't mind destroying a battery, then a 35Ω, 50Watt resistor would be about right.
Oh, and stay up-wind of it.
I really recommend that you take heed of the approach by @berkeman though.
That said, here is a sight with a great amount of information about batteries and how to charge and use them: https://batteryuniversity.com
Cheers,
Tom
- #4
berkeman
Admin
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LOLTom.G said:
- #5
dlgoff
Science Advisor
Gold Member
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Indeed.berkeman said:
For the OP, check out https://batteryuniversity.com/index.php/learn/.
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