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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).

-1
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0answers
38 views

Charging a 12v12ah battery [on hold]

Does this look ok to you? I'm trying to charge a 12v12ah with a 12v battery charger
3
votes
1answer
56 views

Different Wattage Solar Panels for Home [different Voltage/Ampere]

My current solar system for home 12V 100W polycrystalline Solar Panel. 12V 75Ah Lead Acid solar tubular Battery. PWM 12V 10A Solar Charge Controller. 12V Input and 200VA Output Inverter. Current ...
1
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1answer
54 views

Building a battery pack, please help me not cause an explosion [on hold]

I am planning on building a 4 series battery pack using 18650 3500 mAh batteries. I bought the batteries and this 2 amp charger, Battery Charger 16.8V DC 2A Intelligent Lithium Power Adapter EU ...
0
votes
0answers
32 views

How will the batteries of new phones manufacturered two years ago, and bought now be? [closed]

We are thinking to buy Samsung Note 8; it seems to have been launched 1.5 years ago. In reddit, a user said: "Samsung still sells the phone? BTW, lithium ion batteries degrade whether they are used or ...
0
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0answers
49 views

How to switch between charge and discharge?

I want to make my rpi 3 portable with adding a rechargeable battery pack to it. I have 6 Li-ION batteries that are packed together in 2 series rows of 3 batteries in parallel(each battery is a 3.7 ...
0
votes
0answers
26 views

Overvoltage Protection for Battery Charger

I'm trying to come up with some form of precise overvoltage protection between battery chargers and batteries between 12V and 48V batteries. I have 12 and 24 sorted using different methods: crowbar ...
0
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0answers
32 views

Charger current larger than SLA battery initial current

My Chinese 12V charger is rate at 13.8V and 2A. The battery to charge is a maintenance free SLA with 1.68A initial current, 13.8V max standby use voltage and 15V max cycle use voltage. What will be ...
0
votes
0answers
17 views

2S 18650 Li-ion charging module with protection [on hold]

I am looking for a 2S 18650 Li-ion battery pack module that keeps the cells in check during mainly discharging (I can deal with charging them separately, but it would be nice to have that too). So ...
0
votes
0answers
38 views

Strange issue with phone replacement battery [closed]

I've recently bought a replacement battery for my OnePlus 3T on Amazon. At first I thought it was fine. It turned on, showed a decent battery percentage and could use the phone with it. However, with ...
1
vote
2answers
104 views

Battery operation, charge and discharge processes misconceptions

I'm trying to elaborate a simple explanation (and conceptually correct) of how a battery charges and discharges, and why we say things like "the charge stored in the battery is x Ah". For now, I have ...
0
votes
0answers
13 views

Does MP2617H power management IC need an external regulator to supply “Vin” using a 12V solar panel?

I'm designing a LiPo battery charger using MP2617 power management IC. When I referred to the datasheet it tells that these ICs have an internally integrated voltage regulator for the battery charging....
0
votes
1answer
32 views

Xbox one controller rechargeable battery

I wanna make rechargeable batteries for Xbox one controller.i'm new in this field So I have some questions 1_The controllers voltage input is 2.4-3.0 volt. Now is any issues if I use li_ion 14500 ...
0
votes
0answers
15 views

Disconnecting TP4056 DW01A from load when plugged into USB

I have adapted a load sharing circuit that was posted online that uses a MCP73831 to charge a Lithium battery. In my case I wanted to to use the TP4056DW01A and connect its output to to a boost ...
0
votes
0answers
19 views

battery charge controller with small panel

i am designing a battery charge controller with a small panel of 4.5V and 250mA in Arduino UNO. I want that the panel charges the battery(1.2V 3000mAh AA NiMH). i wonder where i place the panel in ...
0
votes
1answer
27 views

Thinkpad 420 battery not charging despite of Cells inside are good [closed]

My thinkpad 420 battery is not charging. So far I have done following. Put another battery in my thinkpad and it is charging perfectly. Opened the defective battery and checked all three sets of 2 ...
0
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0answers
35 views

Importance of Lithium battery cell balancing

Why is cell balancing important for my R/C battery packs but not for some of my power tool or laptop battery packs? Under what conditions can you use serial connected Lithium cells without load ...
1
vote
1answer
66 views

Can I make endless parallel li-ion connections?

I'm looking into building my own li-ion battery pack. I read about linking the cells in parallel and in series, and how to add a BMS. I would like to build a 12V pack with a very large capacity (mAh)....
0
votes
2answers
37 views

Li Ion CC-CV Charger needed for standard protection board? [closed]

I am currently designign a 4S2P Li-Ion battery pack. The cells I use are unprotected, so I want to use one of those BMS/Protection/Balance boards like this: https://www.ebay.de/itm/4S-40A-16-8V-40A-...
4
votes
1answer
47 views

Preventing overcharge of a SLA battery in a solar electric fence charger

I recently purchased a solar electric fence energizer, specifically the Patriot PS5. After it had been sitting in the sun a while, I noticed the battery was making a "gurgling" noise, which according ...
0
votes
0answers
34 views

How does recuperation works in BLDC?

Using BLDC wheels is common on electric transport. A wheel is a multiphase motor, where each phase(coil) is separated from power source(battery) with some kind of transistor, driven by PWM-like signal....
0
votes
1answer
54 views

How to make a battery level indicator for arduino (The battery is powering the arduino also) [duplicate]

Hi I am building a pocket altitude, temperature and humidity meter with 1.8" TFT display. I have a 1000mah 3.3v Li-ion battery to power the whole system. I also need to display the battery level in ...
0
votes
1answer
45 views

Low current LiFePO4 battery charging

I have a portable solar panel capable of delivering 21W at 5V. I would like to be able to charge my 12V LiFePO4 battery with this panel. My AC-powered charge controller is rated at 14.4V 4A which I ...
0
votes
0answers
21 views

how to make rechargeable 2s2p 7.2v configuration with tp4056?

I am using NCR18650 li-ion batteries I need to make 2S2P configuration get higher capacity and 7.4V the same pack I need to charge with TP4056 modules. also, I am using B0505S voltage isolator as ...
0
votes
0answers
18 views

Charging Voltage of Lead Acid Batteries

I recently installed a solar ups and it has been charging the batteries all the time. I have two 12v 230ah Batteries (lead acid tubular) in series and my solar charger software says that it is ...
2
votes
2answers
53 views

Trickle charging 10NiMh in series with ~1W solar panel

I have been put onto a project that needs to be powered by a small (1-2W) solar panel trickle charging a battery pack. The product will be located on rooftops. We have reviewed similar products and ...
0
votes
1answer
37 views

Newbie question about BMS boards and 18650 cells

I would like to replace/convert some old (non working) 18v Nicad power tool batteries to use 18650s instead. I've got some brand new 18650s and some 5s battery management system boards, but as a non-...
0
votes
0answers
29 views

Using a laptop battery with a buck converter with current limiting

I am building a smartphone-powered laptop similar to this. The case is an old HP Pavilion DV4000 that I got. I would like to use its battery for this project, because laptop batteries already have ...
2
votes
0answers
28 views

Advice for a Solar Charger and Battery Project

I am a high school robotics teacher (no formal engineering training) and I am taking a group of students to Kenya this summer to work with high school students there. The organization we are ...
2
votes
1answer
61 views

What is the minimum charging current for NCR18650 li ion battery? [duplicate]

I need a rechargeable battery pack for my project, I need to know what is the minimum charging current for NCR18650 li-ion battery? In the datasheet, it says max charge current is 2A. what is the ...
1
vote
3answers
236 views

Is it OK to reduce the charging current for a Li-ion 18650 battery?

I am using NCR18650 batteries with the tp4056 charging module. When I connect the charger at 2.8 V (fully discharged), the tp4056 IC is getting hot at a 1 A charge current. Is it OK to ...
0
votes
0answers
80 views

is it OK to use battery while charging? [duplicate]

I am using the tp4056 module with protection to charge NCR18650 li-ion battery. is it OK to connect to the load to the battery while it is charging? I am using a booster to boost 3.7V to 9V(load ...
-1
votes
0answers
23 views

i want create a 9w solar panel bulb battery system

I have 6 pics 1.5 w solar panels.I want create a mini battary bulb system using them.what battary,led and charge controller i use? please help me.Sorry for my bad english
0
votes
1answer
47 views

Battery level sensor

I'm designing a smart bin for my paper and would like a sensor that continuously monitors the battery level in real time and in percentage value and then sends the data to the administration office. ...
0
votes
2answers
31 views

Different AH 12v battery to battery bank OK?

Can I safely add a 12V 200 AH AGM battery to a 12V 230 AH AGM battery (from different manufacturers) for a small solar system?
1
vote
0answers
33 views

Sense resistors in system-side Li-Ion charger/gauge circuit

I'm working on designing a charger and fuel gauge circuit for a premade 3S3P Li-Ion battery pack. The battery pack has basic protection circuits onborad (over/undervoltage and a PTC) and only the pack ...
0
votes
1answer
86 views

Is it normal to hear the electrolyte flowing or bubbling when charging an AGM SLA 12V battery?

I plugged a 20A, 8 stage charger into my 2 x 130Ah 12V AGM battery bank and immediately I could hear electrolyte flowing and bubbling inside the battery. The battery bank was full when I plugged the ...
1
vote
2answers
109 views

How to measure the battery voltage while charging

I am designing a battery charger with 48 volt 10 amp output. I am controlling the buck converter pwm using PIC controller. During charging the battery's current and voltage have to be constantly ...
0
votes
0answers
39 views

60V 5A Buck converter for CC/CV application

I need to charge a 14S LiPo from another 14S LiPo. The easiest way would be to buy a buck-boost converter with a current limitation, but I couldn't find a single one keeping up with my specs. So I ...
0
votes
2answers
68 views

Battery charger fundamentals

I am new to field of charger designing but I have to complete one project of battery charger for 48 V 20 Ah Lithium-ion battery having 5 A max charging current. The previous person had done work of ...
1
vote
0answers
34 views

How to combine a charger for LIPO battery with a boost step-up voltage converter?

I want to power a device with up to 4A at 5V from a single-cell LIPO battery of 3.7V 5000mAh and be able to charge it. The idea is to have everything packed up inside a case, so I don't want to rely ...
0
votes
1answer
39 views

Ouput resistance of a charger

I want to measure output of a charger (MODEL: GB28-25126) with below picture: When I connect my HIOKI multi-meter (3280-10F) to output of my charger in order to measure the resistance, it shows OF (...
4
votes
1answer
50 views

Considering lithium-ion variant when picking a BMS board

I have 4 Panasonic NCR18650B batteries and want to purchase a BMS to charge them in series. The following board looks promising, but I'm not sure if it's fully compatible with my batteries. The main ...
1
vote
0answers
51 views

How to disconnect 3.7V battery when USB is connected (boost)

I am developing a circuit which enables me to charge a lithium battery and boost the output voltage up to 5V for a microcontroller. My boost converter is the MT3608, and the charging circuit is the ...
2
votes
1answer
99 views

Actual lifetime of 18650 cells

For a project, we are currently looking at how long we could use battery cells, such as the LG 18650MJ1 at maximum discharge and maximum charge in 25°C ambient temperatures. Basically, in this case, ...
1
vote
0answers
45 views

Li-ion 3s Battery Charger with Load Sharing

I am requesting help to create a battery charger and load sharing circuit with the following specifications: 3s Lithium Ion battery 12 V at 2 Amps to power TPA3128D2 Class-D Amplifier (this is for ...
2
votes
2answers
68 views

Smart charger - how to detect current and voltage of different battery packs and then charge them accordingly [closed]

I am thinking of designing a smart charger for a few of my bikes/scooters, etc detects current and voltage of the pack (30-60V, 1-5A) charges the pack accordingly in the CC-CV mode, fast-charging ...
0
votes
1answer
37 views

Connect two different LiPo batteries in parallel

I am working on a device which needs 1000 mA current at any time. Due to space constraints, I forced to use two different size and capacity battery from the same manufacturer. One is of 270 mAh and ...
0
votes
0answers
32 views

Minimum FLOAT Charge Rate for Deep Cycle Lead Acid Battery

I am needing to maintain a float charge on a 12v 150ah deep cycle FLA battery for long term storage. Is there a minimum amps required to keep a battery charged if it is at nearly 100% or at 100% ...
0
votes
2answers
61 views

charge batteries in parallel at 3.7 V and discharge in series at 11.1 V

I have 3 of 18650 lithium battery cells and one heat element and one TP4056 charging module. I want to connect the cells in parallel to the charging module to charge them and at the same time I want ...
0
votes
0answers
11 views

Cannot set battery profile on LC709203FQH-01TWG

I'm using a LC709203FQH-01TWG Battery fuel gauge. I can read the data provided by the IC, like temperature, voltage, RSOC (Relative state of charge), etc. I can also modify the temperature value, but ...