Hello,
My name is Wan. My focus research area is on Battery chargers. I would like to know the part for Constant Current charging. As i have done a simple circuit for the cut-off battery charger system without constant current.
As I have conducted a few testing for the current control it is...
Hello,
I'm trying to build a AA rechargeable battery charger. Targeted battery is duracell 1300mAh-1.2V and the board is TP4056. The board produces 4.12V ~ 4.2V and 1AMP output. I need to step down the voltage to 1.2 V. Board manufacturer suggested to change Rprog resistor R3 if you want to...
I using the MOSFET IRFB3004PBF switching. 56.2V is a source voltage coming from the charger and 48 is the nominal voltage of the batter.
switch S1 is for switching Vgs.
Vgs=5 v.
Rgs=10k ohms (connected to the gate terminal and battery ground).
battery is 13s3p Nominal=48v Peak=54.6v
Will MOSFET...
Please I have a bunch of lithium batteries connected in parallel, each rated 3.2v and 3Ah.(about 4 of them. I have a laptop charger with an output of 19v at 2.1A. I know I can't connect it directly to the batteries, so what type of circuit can I use to charge the batteries via the laptop...
Hi all,
I need to replace my Dyson V6 charger which is rated at 26.1v @780mA. Rather than buying a new charger I've contemplated buying a $2 MT3608 DC boost converter to achieve a stable 26v from a 12v DC supply which I have tons of. I'm not certain what the output current would be but to be...
Hii Everyone,
I want to make a project in which I want to charge my 12V--7.2Ah SMF(Sealed Maintenance Free ) Battery. I have a solar panel which has Vmp of 18V
, Isc of 0.75A and rated power of 12W. I personally think that this solar panel is generating much more power than to charge the...
I’ve a bunch of Sanyo Cadnica cells of various capacities in my possession. Though they are a bit old they have never been used and are NOS. I’m currently trying to charge a KR-FH 7000mAh cell. As per the label on the battery(please see picture below) it says at 700mA it should be charged 14-16...
I'm posting today hoping for some guidance on a project i would like to attempt. I recently came into a lot of 64 12v 7AH Sealed Lead Acid batteries from a backup UPS. The batteries are still good and take a charge and load like normal for the most part. Since i only have the batteries and...
Hello all,
I am using TPS61253 Boost IC to boost 3.8V from 375mAH Li-Ion battery to operate a load of 2A and also charge the backup Li-Ion battery of 115mAH using BQ25895 chip. Looks like battery is not able to deliver the necessary current and the load circuit does not boot up correctly. Is...
I have 2 18650 li-ion cells, each at 3.7v
(in case you don't see the pictures, they are available here : https://raspberrypi.stackexchange.com/posts/121847 )
and this bay with this white connector
I saw on youtube that depending on the length of the cell, we can know whether they have...
Hi,
My Sony BCG-34HRE battery charger has just died with a loud buzz and then a pop, so I decided to take it apart and see what exploded inside.
Getting inside required a bit of wrestling (damn you hidden screw!) and I took a few pics which I'm sharing here for posterity.
There...
Digitally controlling charge voltage with some regulator like Lm317 is a matter of using some resistor and transistor as stated in lm317 datasheet to select from multiple pre defined voltage.
But what about choosing output current ? How it can be adjust with digital signals from...
I have a Chinese battery charging control module (XH-M603) that I'm trying to use as a float charger for a 12v SLA battery. The problem is that the module only works correctly when it is connected close to the battery using short leads. When I connect the module using 30ft of wire (which is how...
Hello! First time ever posting to a forum of any kind. I have a charger made for charging a single 3.7 volt Li-Ion battery or more than one cell could be charged but at a slower charge rate. My question is there anyway to charge the two cells ran in series as the picture I attached shows with...
I am working on a project where i have to charge a battery from a PV panel source. I have a boost cascaded by a buck converter for my system. The boost converter for P&O MPPT and the buck for the 3 stage battery charging algorithm. So now I am looking to implement the control. So on a...
Hi All,
I would like to build a simple automatic irrigation system with Raspberry Pi zero, the thing is that I don't have access to electricity outside. I thought to connect 5v solar panel + 3\4 chargeable batteries.
Im not that familiar with building control circuits for charging batteries...
Hi
I need help building the electronics for a home project. Essentially I am trying to:
1. Charge a battery with a solar panel
2. Activate a 12solenoid valve controlling pressurized water with a push button
3. Have the solenoid close after an adjustable time delay
I was able to find solar...
Hey!
I have a lamp which is powered by a 5V power supply and I want to upgrade it by powering it with a battery pack.
The issue is I want to use the lamp while charging its batteries but as I know charging and draining at one time is impossible so I searched for simple switching circuit but I...
Hello,
I have lithium-ion battery pack that consists of 21 cells( 3 parallel,7 series,one of them 4,2V 3.4Ah).
I use this battery pack with BQ7791504PW from Texas Instruments for battery protection.This IC achieves pack protection via CHG and DSG low-side NMOS FET drivers.
I use this battery...
Hey, so I am trying to design and build my own battery charger for 4 cell LiPos (including HV-LiPos with 4.35v/cell) but I don't have a lot of experience with circuit design.
I designed this circuit so that it can either supply a constant voltage or constant current to the battery with the...