Questions tagged [over-discharge]
The over-discharge tag has no usage guidance.
43
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Zener behaving strangely
I have recently put together a trivial low-voltage interlock circuit to prevent over-discharge of a 9v battery pack.
I use a Potential divider of 1600 / 5600 ohm to produce 4.7v when Vcc is 7.2.
I ...
- 21
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2
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How might one attempt to recover a fully drained NiMH cell? [closed]
While the particular devices in this question are "consumer" NiMH cells; I am looking for a general answer, based on electrical engineering principles, that applies also to "non-...
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Li-SOCL2 battery undervoltage protection
Working on a long-service device powered by Li-SOCL2 primary battery. I've gathered safe cutoff voltage for this battery chemistry is 2V, so due to that and other reasons I'm aiming for 2.3V cutoff. ...
- 11
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Cutoff circuit with bipolar transistor
I'm trying to build a cutoff circuit with a PNP bipolar transistor (TIP42C) and a TL431A.
R1 = 2.2k
R2 = 11k
R3 = 220
R4 = 4.7k
The circuit should allow the current to flow when the voltage is above ...
- 111
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1S Li-Ion BMS Design
I want to use AP6633 Protection IC along with MCP73833 Charging IC for 1S Lithium-Ion Battery. The issue is pinout of AP6633. I really dont have any idea how to connect AP6633 Pins to MCP73833, More ...
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Adjust lithium BMS over discharge voltage
I have a few 2-series lithium battery protection modules coming from different sources, but all of them are the same classic chinese ones based on Hycon's HY2120 chip.
These are all shuting down at ...
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101
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Lead-acid batteries discharged too far
I have been working with two 12 V lead-acid batteries in series. Accidently, we kept them turned on for a day or two and one of them drained to ~3 V and the other to ~8 V.
I immediately charged them, ...
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Battery over-discharge protection
I am studying NiMH battery charging and using such a battery on a board to feed other circuits. I would like to add a protection circuit that provides protection for over-discharging the battery at ...
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Why do I hear hissing sounds when I discharge my sealed lead acid batteries at high currents?
I've been doing some discharge tests in order to figure out the Peukert exponents of two sealed lead acid batteries with capacities 7 and 9 Ah, in addition to an initial current of 2.1 and 2.7 A, ...
- 633
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Is TP4056 protection absolutely necessary?
My battery has over-charge, over-discharge, and over-current detection properties.
Do I need to use the famous protection circuit as an extra? What are the advantages or disadvantages of this ...
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LIthium 18650 discharge voltage
I am capacity testing 18650 batteries from old laptops using constant current, previously I used 2.8V as discharge/cutoff voltage but now raised the value to 3.0V
Discharge current is 1Amp.
I know ...
- 600
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Not satisfied with 2.5 V battery protection shutoff. How to stop discharge at a safer voltage?
I have some of these lithium ion battery charging modules which are very commonly available online. They use a TP4056 charger and a DW01 protection IC.
The DW01 datasheet says that it should cut off ...
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How to fix oscillation of an 'over-discharge protection' circuit for a lead-acid battery
I've created a circuit to protect my lead-acid battery from over-discharging. I used the following circuit diagram.
Over-discharge protection circuit for a lead acid battery:
For understandable ...
- 754
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Battery pack for very slow charging of USB device
I have a GPS device that has too small of a battery pack (300 mAh) and only lasts a month or so - I want something that can last 6 mo to a year. It can recharge from a USB connection, but only draws ...
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Do I need NiMH discharge protection when load is only LEDs
I'm powering a bunch of LEDs using 3 NiMH cells in series. I don't think I need worry about deep discharge protection as the LEDs will switch off when the voltage drops below their forward voltage.
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