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Questions tagged [battery-charging]

Please specify the battery type in your question. Include chemistry (e.g. lead-acid), voltage, number of cells and how they are connected (series or parallel), capacity (in A·h or W·h).

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3answers
471 views

How do I get 5V 10A output from a 3.7V li-ion battery for 64x16 led matrix display module?

Please I am new to electronics and new here. I'm doing a project which involves the use of a 18650 li-ion battery (or two as may be the case) to power a 64x16 led matrix display module which (...
1
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2answers
95 views

Charging a lead acid battery with a lower bulk voltage

Will a lead-acid battery completely charge when using a bulk voltage below the one indicated on the specs sheets for it, even if it takes longer? In my case the battery is in a place with temperature ...
0
votes
2answers
97 views

Is my 12v lead acid battery 100% dead?

so I got a ups with a 12v lead acid battery that was constantly on so the water inside the cells has disappeared, initially the reading voltage was 0.3v, and when I added distilled water it generally ...
1
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2answers
530 views

Multi-Cell Lithium battery balancing circuit explanation

I found a great application note on building a multi-cell lithium battery charger with cell balancing. http://www.cypress.com/file/70891/download The great thing about this one is that you implement ...
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votes
1answer
50 views

Does a 3rd-Party Cable cause any harm when charging your Phone with the original Power Brick? [closed]

When using the original Power Brick the Smartphone came with to charge it, does a 3rd-Party cable cause any harm to the device or is there no difference to using the original cable?
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votes
1answer
37 views

Should a off-grid wind charge controller be UL certified? [closed]

I recently bought a 2kW wind generator, 48V Charge controller and a UL certified off grid wind inverter for my Home based wind project prototype. My charge controller which I am using to rectify the ...
0
votes
1answer
54 views

What is the best battery configuration for a solar powered electric fence setup?

I have two solar panels: SunWize SW-85P; 85W max power, 5.1A, 16.7V. I have a charge controller: SOLAR BOOST 2000E. I have four 12V batteries: two Interstate SRM-24 (couple years old), two CarQuest ...
0
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2answers
208 views

How to limit HV capacitor charging current?

I have a voltage doubler, which is connected to mains (without galvanic isolation): It enticed me with its simplicity, configurability and option between charging speed or desulfatability. The ...
-1
votes
1answer
46 views

what extra circuit to make a LiPo charger to a LiPo charger can sharing load?

As a (LiPo charger)(Charger A), I refer to this (LiPo charger can sharing load)(Charger B), this So, I have a LiPo battery with protection module. Can I just connect the LiPo and a LOAD in parallel ...
0
votes
1answer
58 views

Do full charges and deep discharges wear the battery because of terminal voltage?

A mobile phone battery charged to indicated 100%, which is not being charged at the moment, might have the same terminal voltage as if it is being charged at 2A while being at an indicated capacity of ...
-4
votes
2answers
144 views

Charging 4x 18650 Li-Ion Batteries in series [closed]

Hello StackExchange community. So i have been for a long time wanting to build someything portable and recharchable with the 18650 batteries. the only problem is i cant find any good guide on how to ...
0
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3answers
424 views

18650 in series while charging using TP4056 and connecting two buck regulators LM2596 in parallel, is it safe?

I'm building a robot which contains a battery system. The 3x18650 batteries are connected in series and are charged using TP4056 boards. The voltage is then fed into the circuit shown below. The ...
-2
votes
2answers
694 views

How to charge lithium ion battery in series and parallel?

I want to use TP4056 in my solar power bank project to charge a lithium-ion battery (3.7 V, 2000mAh each one), but I don't know how to use it when I want to charge more than one battery. Is those ...
2
votes
1answer
166 views

How to find out what level of battery voltage corresponds to 50% discharge?

In my off-grid solar system I am using 12V lead-carbon batteries capable of surviving 4000 cycles when discharged up to 50%. Capacity is 200Amp-Hours (100 Hour discharge) per battery. There is no BMS ...
-1
votes
2answers
206 views

Battery bank system for a load of 1600 Watts

How many batteries of 12 V x 125 Ah needed to continuously run a load of 1600 Watts using an inverter of 24 VDC x 120 VAC that uses a battery bank as primary source? For a load of 1600 W , at least ...
0
votes
1answer
28 views

Charging rate for deep cycle 12v battery

I have a 75 AH deep cycle battery(AGM) and I have a battery charger with 2 modes, 5.5A for car, 2A for motorcycle, as far as I remember, lower charging rate is usually better for longer battery life ...
0
votes
1answer
58 views

How can I limit the voltage of a circuit so that it is always between 8 and 15 volts?

I am currently working on a project in which I am using piezoelectric material to charge a battery. The voltage output of the piezoelectric material is variable depending on how much mechanical energy ...
0
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2answers
1k views

How to charge a 48V battery (12V battery * 4 in series connection) with a 12V charger?

I found a question about charging the battery with a 12 volt charger. However I’m confused as to do this? First method, unhooking and charging each battery individually? But wouldn’t I be just ...
0
votes
1answer
90 views

Charging a device with higher amperage, can somebody please clear up the confusion and contradictory statements?

I have a PS Vita I wish to charge with my Samsung Galaxy charger, its output is 9.0V = 1.57A which is for fast charging (correct me if I'm wrong) and thus won't handshake with the Vita so won't supply ...
1
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0answers
669 views

Charge car battery with lab bench power supply

Is it possible to charge a lead acid car battery with a lab bench power supply? I am thinking of hooking it up to 13.8 Volts and 1 Amps. Will this work?
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votes
1answer
43 views

How does this circuit works for detection of Logic low, Logic High and Hi-Impedance state?

I was working on a design of Li-ion battery charger using LTC4001. Here a pin is called CHRG, which indicates the different state of charging like charging cycle begins, threshold reach(i.e 4.2V or C/...
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votes
1answer
198 views

How to make battery controller with arduino?

I want to make simple UPS with means of arduino, to learn the processes from it, and be able to record and monitor at PC. For the start i want to implement buffered usage charge mode. Logic is simple -...
0
votes
1answer
210 views

How can I use two TP4056 with four Li-ion batteries, but single load?

Need to connect and charge two Li-ion batteries in series. I'm not sure if it is possible to connect and use two Li-ion batteries and TP4056 like this. Are they going to be balanced? Do they need to?
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votes
1answer
33 views

Frequently interrupting the CC charging stage of a Lithium-Polymer battery

Because of design constraints I need to charge a 2S Li-Po battery over its balance connectors using a single-cell charger IC (e.g LTC4002). In order to allow the user to interrupt the charging process ...
1
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1answer
1k views

Can I safely parallel 2 separate 18650-based Li-Ion battery packs, each with their own BMS? [closed]

I have a couple of 18650-based 10S2P 36V nominal 4.4Ahr Li-Ion battery packs from my electric skateboard which I'd like to permanently put in parallel to double my range and improve my power during ...
0
votes
1answer
95 views

Can two normal batteries be connected by series and parallel, at fraction of second apart, so as to charge and discharge at the same time? [closed]

Two ordinary wet cell batteries can either be connected by series or by parallel. What happens if I have a contraption that enables these connections to alternate between series and parallel cycles ...
1
vote
1answer
66 views

what size battery storage is needed to provide 10A at 115v for 5 continuous hours

I have a two part question: What size battery storage is needed to provide 10A at 115v (I meant 115v AC) for 5 continuous hours? what size solar array (assuming proper alignment, etc.) would be ...
0
votes
1answer
1k views

How much voltage and Amps to charge a 24V Battery?

If I have two 12V 18A and I whant to charge them in series making a 24V 18A battery. With how many Voltage and Amps do I Need to Charge this 24V without damaging the batteries.
0
votes
1answer
63 views

MCP73831: VBat Voltage drop with new uncharged batteries

I made a circuit for charging a 40mah lipo battery (381018), my problem appears when a new uncharged battery is connected. The battery measures 0V at the begining, when it's conected the VBAT pin ...
1
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2answers
658 views

Do I need to fuse batteries in parallel?

I have two deep cycle batteries in my Airstream, in the panel there is a fused bus bar (that appears to be faulty) so the solar panels only charge the one battery. Can I just run a heavy gauge wire ...
0
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1answer
253 views

What is the miminum voltage for series NiMH pack?

Suppose a pack of 8 AA NiMH cells are serially attached and its known NiMH cells should not go below 900mV per cell. Does this really mean the pack should not be discharged past 7.2v?
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0answers
215 views

Do NiMH demand balancing?

Is it fine to charge a pile of 8 2 Ah AA NiMH @ 11.6 V 0.5 A serially? They are from the same packaging and were bought only for use as an 8x pack - they were not used for anything else. Im not sure ...
0
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2answers
90 views

Smartphone internal charging circuit type and efficiency

USB usually provides 5V (or even more, for example 9V with Qualcomm Quickcharge) and the phones contain a single li-ion cell with 3.5-4.3V, so there must be some dc-dc converter in between. I wonder ...
0
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0answers
69 views

battery backup switching

I am working on an appliance project in which I have been tasked with the design of the power supply. The project specifications hold that from a 230v 50Hz wall supply two voltage rails of 5v (for ...
0
votes
1answer
40 views

Wiring Up a Li-Ion Battery (Band 2)

I have a Li-ion battery that I pulled from a MS Band 2. It comes with a protection chip, which I am having trouble with. The chip has 4 accessible pins, labeled "P+, K, T, P-". I've tried every ...
2
votes
2answers
358 views

Mosfet heating in current limiter circuit

I am designing a lead acid battery charger using Battery University for guidance. This is the circuit I made. The power supply is from an Adjustable 12V power supply. I have set it to 14.4V. The ...
0
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0answers
15 views

Odd behavior charging Apple products from 5vdc [duplicate]

I'm designing a PCB for a product, and this product will incorporate a 5vdc USB-A output to charge other devices. To get a sample of what current different devices will draw from a non quick charge ...
1
vote
0answers
82 views

Uninterrupted power supply with auto shutdown lead Acid Battery

Bellow circuit is an uninterrupted power supply(4.7 Vout after regulator) with auto shutdown when the battery is low. I am using a 6-volt lead acid battery with 9v charger. I am looking for an Idea ...
0
votes
1answer
50 views

Charging SLA Battery

I currently have a project requiring the use of a battery. My project has to be able to run off the battery power, but when an outside source is connected, the battery should be able to charge off ...
0
votes
1answer
319 views

MOSFET switch between parallel batteries for dual charging

UPDATED: I am developing a wireless device composed of : 2 Varta CP 1654 A3 Li-Ion 3.7V 120mAh (supporting 2C charge) with protection circuit module 2 MCUs that can handle Li-ion CC/CV charging My ...
0
votes
1answer
56 views

Can high power USB destroy older devices? [duplicate]

My brand new pair of bluetooth headphones stopped working after charging them with a 2.1 Amps USB outlet. I can't turn it ON anymore. I do see the LED battery Green then I charge it though. I noticed ...
1
vote
1answer
55 views

Designing a 2S Li-ion charger with 5V 2A input

I'm interested in designing a few similar charging circuits based on the specs of the title which is getting a charging for 2 cells in series(or more) from a 5V input. Now my question is: Assuming I ...
0
votes
1answer
98 views

How to detect mains outage for 12V SLA battery charger

I'm wanting to use a 12V SLA battery and off the shelf mains charger as an uninterruptible power supply for an Arduino or similar device (via an appropriate 12->5V regulator) as also described here ...
1
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2answers
139 views

Can I charge my AC rechargeable hearing aid batteries via USB PD with converter?

I hope you'll be able to help. First of all this is a bit of a complex one that I'm struggling with. I wear hearing aids, both of which use removable, rechargeable batteries, charged only by a charger ...
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1answer
148 views

Lead acid battery charging current dosent become zero

Here I am charging a 6V 4.5Ah lead acid battery by using a 8V-10V LM317 input supply for the circuit. I'm using the BD139 transistor to cut off and a 6.8V zener diode. As the battery voltage reaches ...
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votes
2answers
55 views

SLA battery constantly being charged and used

I have a 12V 7Ah SLA battery with a smart battery charger for SLA batteries with the maximal output of 0.8A. I would like to use the battery to charge an Arduino board with few other things (at most ...
0
votes
2answers
61 views

Charge current for a 8000 mah lipo battery?

I have a 3.7V lipo battery with 8000 mah nominal capacity. From what Ive seen online, the charging current should be 8A for a 8000 mah battery. Is that true? Will charging it at a lower current damage ...
1
vote
1answer
35 views

4Channel Smartphone Charger 5V 25A [duplicate]

I wanted to experiment a Smartphone Fast Charger. My source would 5V 25A, and output would be in 4 channels, all in parallel. Would that be safe to charge a smartphone? If no, what can I use to bring ...
0
votes
1answer
32 views

Use both mini-USB and micro-USB power supplies in parallel

I would like to add both mini-USB and micro-USB connectors onto my PCB for Li-Ion battery charging. Is the attached schematic fine (safe) ? I have never tried such type of connection yet and it ...
1
vote
1answer
185 views

How to design a circuit to disconnect battery charger automatically?

I want to use an AC to DC 14.4v adapter to supply both my circuit and its battery. The circuit works with 12v and I used a battery during power outage(blackout time). I have prepared the below circuit ...