Questions tagged [over-discharge]

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12
votes
3answers
9k views

Is it safe to discharge Li-Ion to 0V?

first of all: I know that a completely discharged battery is damaged permanently. I know it experiences irreversible chemical changes. I know it might blow up if you try to charge it. But that's not ...
11
votes
2answers
3k views

How much current can lead acid batteries safely supply?

I have a motor I wish to drive with an 18V lead acid battery. The motor can draw quite a lot of current when stalling and I am worried of overdischarging the lead acid battery. Unlike LiPo batteries ...
4
votes
2answers
1k views

AP4306 has paralleled two op amps in it's block diagram, is that possible?

Thank you for taking some time to read this. I've recently come across a nice constant voltage/current source (http://www.mouser.com/ds/2/115/AP4306A_B_C-271586.pdf) called an AP4306. Upon reading ...
3
votes
2answers
128 views

Will it be fine to consume 0.0058 mA from a LiPo cell after its lowest discharge voltage of 3V has been reached?

I intend to connect a 240mAh 1S 3.7v 25C LiPo Battery with a 5V Step-Up Regulator to the Arduino pro mini v5 VCC pin bypassing the linear voltage regulator. But the battery datasheet says "Never ...
3
votes
1answer
4k views

What happens if you draw too much current from a 12 volt sealed lead acid battery?

We all know the Michael Bay-esque excitement you get if you misuse lithium-based cells, but I've heard lead acid batteries are a lot more durable. The datasheet for my sealed lead acid battery says it ...
3
votes
1answer
287 views

Where does the system load go on a bq51051b charge controller?

I'm trying to use an integrated chip for Qi Charging + lipo management + overcharge protection and all the hard stuff basically. The only one that is 'integrated enough' seems to be: http://www.ti....
2
votes
1answer
834 views

Compare over discharge protection disconnect circuits

I am trying to implement a "discharge protection" circuit for an uC (Arduino) powered by a battery. The uC monitors battery voltage and needs to be able to signal the circuit to turn off. Turning on ...
1
vote
2answers
707 views

Detect power supply voltage threshold, while consuming very low current

Lead acid batteries get damaged by over-discharge somewhat like lithium polymer batteries. I need a circuit that will cut off the load from the battery when it drops below about 10v. That is the easy ...
1
vote
0answers
154 views

How can I use 2 Tp4056 as protection circuit for diy 2s li ion battery?

Hi I want to use 2 Tp4056 modules as over-discharge protection circuit for my DIY 2s li ion battery pack. Those will not be used for charging! hence will not share input! The load is an arduino nano ...
1
vote
1answer
1k views

Using a voltage supervisor IC to protect a Li-Ion battery from undervoltage >2.8V?

Sorry if this has already been asked, I tried searching but might not have the right vocabulary. I'm starting to use lithium-ion batteries to power projects, and I've wound up with some 18650 cells. ...
0
votes
3answers
2k views

How to build Li-ion over-discharge protection board

I have an Arduino board with a pump attached to it, and for powering both, I'm using a 18650 battery cell with a DC-DC Boost Converter. I plan to leave it working even when I'm not home, and I know ...
0
votes
1answer
697 views

what does built-in LiPo discharge protection look like?

I bought a 100 mAh LiPo from the b&H website because it specifically said that it had overdischarge protection. I really need a reasonable lifetime for this battery so I hooked up the battery to a ...
0
votes
3answers
178 views

Charge Rate Myth?

Many websites post that charging your device with a high ampere charger will heat up the device and depreciate battery life. Is this really true. I have a sony nex camera that uses 5v 500ma input. Is ...
0
votes
1answer
42 views

18650 battery pack with “dead” cells, other cells still usable?

I have an 18650 battery pack (12p20s so 240cells) with 2 parallel groups which recently "died" (voltage is 0v or very close to 0v (0.09v for one of the packs 0.0v for other parallel group). ...
0
votes
1answer
48 views

Deep Discharged Primary Battery Pack Voltages

I deep discharged two 4 cell (2S2P) 7.2 V Lithium Thionyl Chloride battery packs each connected to a GPS tracker. I ran the two packs until each GPS tracker stopped communicating. (can't be certain ...
0
votes
0answers
99 views

Over-discharge protection for 20V lithium battery pack

I am soliciting your help regarding a project I am working on. I have done my research but can't decide which solution is optimum for my needs. By optimum, in this case, I mean will consume the less, ...
0
votes
1answer
118 views

Comparator loses voltage when connected to mosfet

I want to make a discharger for 18650 batteries so I can store them at a specific voltage. I built a comparator (LM393) with a voltage reference to 3.8V at the inverting input and the voltage of the ...
-1
votes
1answer
271 views

Battery overdischarging never recover

I really need your help!! I used S-8261 series for battery protection the following picture is circuit and spec of the battery protection When the voltage drop down under overdischarging voltage (2....