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).

Filter by
Sorted by
Tagged with
0
votes
1answer
164 views

Converting 6c (3s2p,4.5v) DC motor to 1s4p 18650 charging/protection

Having a hard time figuring this one out, I am trying to convert a 4.5v 25w dc fan from an air mattress pump to run off a rechargeable battery pack made with 18650's. This is going to be charged and ...
0
votes
0answers
734 views

PWM Battery Charger Power Schematic

I am trying to come up with a simple Battery Charger design, which utilizes PWM control. The use of high frequency PWM is to reduce the size of the Transformer that is to be used. Planning to use ...
0
votes
1answer
148 views

High voltage battery charging with low voltage charger?

I have two 3.7V batteries to be used serially for my device. Is there any way to charge these batteries with 3.7V charger? Or do someone show me a circuit having a button which when pressed connects ...
0
votes
0answers
49 views

Adapting 18650 Lion specs to charge 6 in parallel

I have an eBike battery pack of 78 18650 cells (13s6p) that I need to charge for storage pending a BMS. I have the following specs from the data sheet: I want to charge the individual cells (of six ...
0
votes
0answers
133 views

Best battery configuration: 1s1p vs 3s1p vs 1s3p? [duplicate]

I’m designing a product prototype using a single board computer (like a Raspberry Pi) that requires an 8-18V DC supply. It has to become battery powered, so I’m looking into the best possible ...
0
votes
1answer
245 views

Drone Thermal Imaging solution: Power Supply Module - Design Review & Load Sharing Query

I'm designing a DIY Thermal Imaging solution for my DJI Mavic Pro drone. Whilst the full design has been included for background info, this post refers to the power supply module design. The pertinent ...
0
votes
0answers
4k views

after replacing micro usb port, tablet charges only 450mah [duplicate]

I changed micro usb port which was broken (it takes out from motherboard) on tablet. On motherboard are 5 contacts and one is damaged (4. - it is for data transfer, ID). I solder +5 VDC contact and ...
0
votes
0answers
210 views

How to connect 2 thermistors for battery protection?

I'm planning to use BQ24100 for charging Li-ion cells connected in parallel. Unfortunately, the cells have to be separated by few centimeters, so I have to use 2 thermistors. So, how to connect 2 ...
0
votes
1answer
214 views

18650, charge and supply at the same time

I am planning to use a NodeMCU with a couple of encoders to determine the position a telescope is pointing at. While running, the device will be connected to wifi all the time since it needs to ...
0
votes
1answer
1k views

BMS for Li-Po with balancing and protection

I want to build a robot based on Raspberry Pi with Raspberry Camera. It will use tracked car chassis to move around my flat. I'd decided to use 3-cells Li-Po battery to power this robot (because of ...
0
votes
0answers
77 views

charge controller question: disconnect pv with mppt from full battery

I'm creating a battery charging model with pv and a buck converter controlled via a P&O mppt algorithm. My charge controller currently disconnects the pv panel from the battery as the latter ...
0
votes
1answer
56 views

Is the usual model for batteries still valid in the reverse direction?

We all know the usual (simplistic) model for batteries, that is, representing it by a pure constant voltage source in series with its "internal resistance". This is probably sufficiently precise for ...
0
votes
0answers
77 views

A cheaper way of Lipo battery charge and power switching

I have been reading stackexchange for last 5 days but could not see any proper / answered circuit / discussion about Lipo battery charging and backup and thus asking the question here. I am doing a ...
0
votes
0answers
97 views

Estimating the capacity of unknown LiPo cell

I recently salvaged this small (30 x 9.5 x 3.5 mm) LiPo single cell battery from an old device that lied broken for at least 3 years. Therefore I expected it to be garbage ready for recycling, but ...
0
votes
2answers
101 views

Solar battery charger

I'm trying to simulate the following circuit taken from http://www.techlib.com/electronics/battery_chargers.html. The circuit is supposed to charge 6V battery (shown as Zener diode in the circuit). ...
0
votes
0answers
622 views

Have my AGM batteries reached EoL or is my charger defective?

My setup: two 12V 20Ah AGM batteries in series for 24V. Typically discharged to about 50% depth on average about 3 times per week (less often in winter, batteries are kept indoors). The current set of ...
0
votes
0answers
29 views

Software definable battery controller to be able to re-use various laptop batteries

I'm looking to retro-fit an older small netbook Toshiba NB100, by replacing the logic board with the single core Atom 1.6Ghz with an up-board core. A hardware/software solution for re-using the ...
0
votes
1answer
140 views

Power bank DIY Build( Regarding protection circuits)

I have been toying with the idea of making a power bank as I have a few old laptop batteries lying around which are still working well. I plan to use these components: Constant current lithium ...
0
votes
0answers
58 views

Can I charge a Li-ion cell with high voltage until reaching the nominal one?

I have one 18650 cell which has a nominal voltage of 3.1 V in the specs. Right now, it is discharged and reads 2.8V. I was wondering if I can charge it directly with a panel solar (18V) until it ...
0
votes
0answers
319 views

Arduino charger, can I use a step up regulator in the circuit?

The question is: how would I modify the below circuit to make it work with an 18650 3.7V 2500mah battery which I want to charge at 1C during constant current phase? Note, 1C should be fine as ...
0
votes
1answer
167 views

Using MCP73213 for charging two Lithium ion batteries connected in series

My device has some loads which use 5V. I can't use a single Li-ion Battery as it'll give only 3.7V. So I've decided to connect the batteries in series to get 7.4V power supply. Since my wall adapter ...
0
votes
1answer
73 views

What additional electronics are required for construction and use of a 240-cell Ni-MH battery pack?

The robot (R2-D2) that I am building requires a MASSIVE battery. 800 Wh, to be precise. Cost is the primary driver, second to weight and volume. This, in combination to the high cost of any (non-lead) ...
0
votes
1answer
239 views

Help me to understand VOOC fast charging for lithium ion batteries?

I know common VOOC charger have fast charging rate of 18W(9V/2A). But how it possible even current is only 2A. I mean 2A current have only stored charge 2000mAh(2A*1h). How changing voltage can charge ...
0
votes
0answers
58 views

Regulating load to find MPP

I'm trying to design an MPPT system for photovoltaic cells for a school project. As far as I understand I have to change the duty cycle of a buck converter to change the voltage of the PV so I can ...
0
votes
0answers
214 views

How to disable the remainder of a circuit when a charger is plugged in, using minimal components?

Is it possible to detect if a charger in plugged in, and disable (or completely disconnect) any of the remaining circuit? This image from Detecting When a USB Device Is Plugged In For Status LED ...
0
votes
1answer
66 views

can you power a load and charge a battery with a votage source 2x the battery voltage?

I'm sorry, I am very new and green to circuitry, and probably frustrating to read. I have a hypothetical question about a circuit with a 6.6 v charging source that is both charging a 3.3 v 100 ah ...
0
votes
1answer
41 views

Simulate Battery for Bluetooth Device

I have a little bluetooth to aux in my car which is battery powered. I want to hook it up directly without the usb cable hanging when charging. The problem is that I can't leave it always connected ...
0
votes
1answer
53 views

Charging devices with different max voltages

I have a project that requires me to make a portable power pack that can be charged up and then power different devices. The product needs to have two USB charging ports and hold around 7Ah. The ...
0
votes
1answer
180 views

LiPo charger module for 5.2V/2-3A load

I have a load (more specifically a Raspberry Pi 3 B) which requires a voltage of 5.2V and needs around 2-3A current. It should be powered by a LiPo battery with a capacity of 6000 mAh. In addition to ...
0
votes
1answer
420 views

Increasing Overdischarge Protection Voltage in DW01A

I am working on a academic project which requires TP4056 along with battery protection circuit (DW01A). The ciruit uses a 1S LiPo 500mAh battery. I want to keep the Overdischarge Protection ...
0
votes
0answers
163 views

How to trigger 12v environment on PowerBank [duplicate]

The Desired Result: via rechargeable battery, power a 12v 1 meter led strip that takes 1.2 amps. I have purchased an orico power bank with 12v 1.35amps output as it meets the dimensions needed for ...
0
votes
0answers
34 views

Replace a power adapter 12V/1A DC with 15V/0.8A [duplicate]

I have a battery-charger that has an input of 12V/1A as specified in the specs. Can I replace the adapter with a 15V/0.8A ...
0
votes
1answer
116 views

Charging the 18650 battery [closed]

I create a arduino robot car and I used the power bank for the supply of arduino. And I used L293D Motor shield arduino and the supply I used is the 4pcs of 18650 battery, I series the 2 pairs of the ...
0
votes
1answer
52 views

Back Up Battery System Design

So I’m trying to design an AC/DC convertor for a test unit that will go inside of an environmental chamber, but I’m also trying to build in a battery backup charger and switcher circuit, in the event ...
0
votes
0answers
34 views

Laptop style multi-cell battery charge and power draw

Basically, I'm trying to build a laptop of sorts. Long story... but I want to be able to have the same type of battery setup. I need between 14 and 24V from a multi-cell lipo pack but I want it to act ...
0
votes
2answers
2k views

AC brushless motor as generator

How can i use an AC brushless motor to charge a battery? If I need to do it with a rectifier then what kind of rectifier should I use?? My motor is 1250kv and another one is 500kv. Can I use an Esc ...
0
votes
1answer
129 views

Different types of seal lead acid (SLA) battery chargers! [closed]

I'm new here and want advice on battery chargers to buy for my 12v 18AH/20HR sla battery! I want to know if a 6v and 12v 1200 mAh battery charger could charge this battery and how long would I have to ...
0
votes
1answer
338 views

12V DC Overvoltage Protection

I'm trying to create a air pump system with a rechargeable battery pack. My question is: Because my air pump is a positive desplacement pump, which task is to create a vacuum in a container, will its ...
0
votes
0answers
122 views

Any mistakes I should correct

I'm in need for some schema validation. I'm about to send the schema for PCB making. Parts that are being used are DW01 (Lipo Cell Protection IC) and FS8205A (Dual Channel Mosfet). Do you see any ...
0
votes
0answers
116 views

Combined 5V Input/output for charging/discharging a 3.7V rated Lithium Battery

I am not an electrical engineer but I noticed that many Powerbanks are designed to fail because they allow deep discharging the battery below 3V and then do not charge anymore. I came up with the ...
0
votes
2answers
63 views

Rechargeable Lead Acid Charging [duplicate]

I am planning on using a rechargeable lead acid battery for my tennis ball pitching machine. Is it feasible to hook them up to motors and run the motors until the battery is empty, and then come home ...
0
votes
0answers
128 views

Help with assessing maximum operating voltage of a circuit

I am designing a field charger for charging lipo batteries while I am out flying and on the go and I already have a huge 16000mah 4S lipo available that I could use to charge my 1300mah 4S and 2200mah ...
0
votes
1answer
725 views

PNP Transistor to switch between Voltage Regulation and Battery Charging

I am relatively new to circuit design and would appreciate your feedback on this :) I am designing a power supply circuit that uses the TI TPS61030 voltage regulator. It features a 4A internal switch ...
0
votes
1answer
34 views

Current Boosting Techniques for Source Side

I'm trying to use a portable power bank (5V/2.1A) and try to supply power to my DC/DC Converter which will then be used to power something else (probably a laptop or so). However, the issue is that ...
0
votes
1answer
74 views

Simple Solar Setup question

I have recently purchased a 10W polycrystalline solar panel with 30A battery clips, a 20A solar charge controller (intelligent regulator with 12V/24V USB display) and a 12V 7Amp lead acid rechargeable ...
0
votes
1answer
581 views

Need advice on UPS circuit with variable voltage input

I want to make my own UPS circuit and I extended the one I found here so that I can connect 5V to up to 28V to it. I've tested the circuit with some parts that I had laying around (not exactly the ...
0
votes
1answer
47 views

How do I know if a development board can be charged by batteries?

So this question might sound a bit weird since I'm pretty new to programing development boards. What I need is a board that can be powered using a battery and that also supports Bluetooth. I'm ...
0
votes
0answers
76 views

Recover battery management system for screwdriver without external power

I used one of many (Battery Management System) BMS on the marker to convert my Ca-Ng battery to Li-ion one. An example: this When bit is stuck or when you want to fixate a drill on drilling position ...
0
votes
0answers
368 views

What is the charging current specification of a BMS?

I'm planning on using this BMS: https://www.aliexpress.com/item/3S-11-1V-25A-Li-ion-Lithium-18650-BMS-PCM-battery-protection-board-bms-pcm-with/32816991614.html And 3 Samsung 18650 cells in series: ...
0
votes
0answers
90 views

Using Transistor to dump excessive voltage?

I'm way over my head with this and need a poke in the right direction. I'm building a small hobby LiPo charger (I'm aware of the risks with a LiPo battery packs regarding usage, charging and ...

1
35 36
37
38 39
42