Questions tagged [battery-chemistry]

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15 questions with no upvoted or accepted answers
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How does the charging curve of a deep-cycle lead-acid battery change as it degrades?

I am designing a circuit inside a UPS that periodically tests how long the battery can power the load. It does this by breifly disconnecting the power from the UPS and extrapolating from the measured ...
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0answers
26 views

Deep Discharge of Cells and Batteries

This is a question related to What makes primary batteries leak on very deep discharge? What are the dangers of deep discharging a cell or battery? I've seen a LiPo battery getting puffy most likely ...
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1answer
52 views

What causes ions inside of a lithium ion battery to move between the cathode and the anode?

I understand that inside of a lithium ion battery, the ions move from the anode to the cathode internally during discharge in order to attract the electrons to move from the anode, through the wires, ...
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38 views

Any deleterious effect from very strong, close magnets on NiMH cells over time?

This question probably isn't a perfect fit for this SE, but I did find this question: Will placing a strong magnet near my electric skateboard Li-Ion Battery pack damage or discharge it? This is a ...
1
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1answer
41 views

How much energy do Li-Ions/Li-Pos have below 3.2V threshold?

How much energy does a battery still have when a protection chip disconnects it? I know that such discharging kills the battery, but in some cases it would be useful. For example, in drones: when you ...
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0answers
90 views

Simultaneous Cathodic Protection and 4 Wire Resistance Measurement

I am making an electrical resistance sensor for erosion rate measurement using the Arduino. Since my sensing element is a thin strip of carbon steel, I have to ensure that it is protected from ...
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1answer
81 views

Old 9v battery - Strange Behavior

The battery in my garage door remote finally quit. Before replacing it, I measured the voltage with a digital multimeter and was surprised to find it reading 9.70v, quite a bit higher than the ...
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1answer
49 views

200AH lead acid battery

I have a 12V 200AH lead acid battery and I want my load be a power resistor and a bulb. Does the batter draw current based on the load resistance? so meaning the current that will be drawn in this ...
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0answers
23 views

Li-ion cell voltage balancing issue while charging

I have a two cell li-ion battery which has specifications of 7.4v, 2200mAH. I used one cell (3.7v, 2200mAH) for a required project. I discharged it and then reconfigured in to series(7.4v, 2200mAH) ...
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32 views

Conflicting information on Qualcomm quick-charge 3.0 standard

Out of many fast charging protocols, Qualcomm quick-charge 1.0/2.0/3.0/4.0/4+ is a prominent one. I tried to find the specification of quick-charge 3.0 protocol. However, the material spread across ...
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2k views

Difference between Tubular and Tall Tubular Inverter Batteries

What is a difference between Tubular and Tall Tubular Inverter Batteries with same configuartions? Why are Tall Tubular batteries are priced high than Tubular Batteries? Tall battery have warranty ...
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1answer
305 views

What is the actual capacity & charging current of a given deep cycle lead acid battery?

Firstly let me say that this is with a view to using a lead acid battery for backup purposes in case of power outage (mains power, a few lightbulbs but with daily outages lasting a few hours) So let'...
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74 views

What happened to my Ni-MH battery?

I made a little custom data logger. It's powered by a rechargeable AA Ni-MH battery. Typically, it lasts about 2 weeks on one battery. Then it uses a low voltage cutoff to sound a low battery alert,...
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1answer
28 views

Does the charge of a battery affect its discharge voltage or current?

Although I am making an electrochemical battery (1 lead acid cell), I thought that this question would be more suitable here. Would there be any difference in the voltage and current of the cell (when ...
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106 views

Why are Nickel Iron batteries expensive, less manufactured and not researched much?

I have read about Nickel-Iron batteries and from what I have understood they have very long life and large cycles. They are heavier than lead-acid batteries, but even lead acid cells are used in ...