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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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12 views

BQ2002, LM317 NiMH charging circuit. How to control the current output?

I have designed a charging circuit utilising the BQ2002 and LM317 for 2x 1.2V NiMH batteries, and it is to be charged using a 5V USB input, I need the output current to be between 550 mA and 1A. I ...
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0answers
22 views

Can the negative impact of mixing new and old batteries be mitigated?

Mixing old and new batteries is bad. But there are various options how they can be mixed, and I guess there are use cases in which certain ways of mixing can be justified. In my off-grid solar ...
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0answers
26 views

Possible to make an inductive charger that operates on the front of a phone? [on hold]

My wife uses a bulky phone case that prevents inductive chargers from working. Would it be possible to manufacture a charging coil that had the opposite "polarity", so you could lay a phone face ...
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2answers
43 views

My portable charger with more capacity than my phone battery does not charge it fully [on hold]

I have a portable charger with a 3260 mAh capacity while my phone only has a 3000 mAh battery. However, my charger can never fully charge my phone. It only ever gets my phone to around 75-80 percent ...
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0answers
37 views

Laptop battery SMBus broadcasting [on hold]

I connected a laptop battery connector to a micro-controller through SMBus. I can read information from battery such as state of charge. I listen to the battery broadcasting charging current and ...
-1
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0answers
15 views

LG G6 Phone will sometimes charge ONLY using powerblock? [on hold]

About once every six weeks my LG G6 throws a wobbler. The phone will not charge up using its mains adaptor. The only way to get a charge into is by using an Anker power block. Then it charges up fine....
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1answer
29 views

Using a 7.4 V LiPo Battery for an Arduino Feather 32u4

I am working on an Arduino project at the moment, with the following board: Adafruit Feather 32u4 And it says I need 3.7 V of LiPo to power it. However I also have a valve that I want to open and ...
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0answers
30 views

BMS for 12v Lithum battery pack

i am making a 18650 battery pack with a configuration of 4x3cells for 12v. i am using these cells, https://liionwholesale.com/products/samsung-inr18650-25r-battery-genuine-tested-20a-2500mah-flat-top-...
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1answer
35 views

BQ2002 NiMH Charging Circuit not working

I have the following charging circuit based on the BQ2002 which will charge a NiMH battery using a 5V micro USB cable. I built the circuit already and noticed that the TIP32C is not getting hot and ...
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1answer
14 views

MP26029 Battery Charging IC OTP issue

I am working on this battery charging IC MP26029, it has OTP Funtion (One Time Programmable). But i do not know how to program this IC, as there are no Uart or I2C pins available. Does any one know ...
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1answer
47 views

How can i calculate the life of a battery while it is also currently being charged by a solar panel? [closed]

Presuming the battery is using more power than what the panel can produce? 3716 mAh battery Consumption of 250 mA with a rate of 0.7 While I can use this to calculate the battery life, how would I do ...
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3answers
24 views

Balanced Charging of ZOP 2s lithium ion battery

Good day everyone, I recently purchased a “ZOP Power 7.4V 2200mAh 2S 35C Lipo Battery T Plug” for a project. I have designed a circuit to charge the battery, but now I am wondering if it is necessary ...
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0answers
20 views

How Fast / VOOC / Dash charging works? [closed]

A battery can be modelled as Equivalent series resistance. So Battery connected to a charger is similar to a resistor connected to a voltage source which draws constant current. Will the type of ...
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0answers
23 views

Charging multiple batterypacks in parallel

I am sorry if this questions seems kinda basic. I am currently working on a small project involving a bluetooth amplifier module requiring a minimum of 12v input. My idea was to use a ...
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1answer
71 views

How to unite three different batteries in to one powerbank [closed]

I'm absolute beginner in electrical engineering and I need help in building a powerbank using three different batteries with different characteristics. I have a sudden passion to implement this ...
-2
votes
1answer
41 views

DC-DC charging different voltages

I have several banks of batteries on a boat, two larger banks 48v electric propulsion system with regen 12v house bank Each has a charging source the 48 has regen up to 2kw while sailing The 12 has ...
-1
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0answers
38 views

Solar Charged-18650 Battery Bank in parallel with TP4056 modules

for my off-grid project I plan to power an Arduino system using 5.5V 4W panels (placeholder, may source larger panels with same voltage for winter months) and Lithium cells for night operation (...
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1answer
70 views

Switching between two completely independent circuits

Background: I have built a 2S 7.4V battery out of two 18650 batteries. I have some TP4056 (5V 1A Micro-USB) charging modules lying around. I would like to use these the TP4056 modules (one per 18650) ...
1
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1answer
86 views

Why does my phone pull less current from power bank when the screen is on? [closed]

While charging my phone (a Samsung Galaxy S5) with a power bank that displays the power output with 0.1 W resolution, I turned the screen on. To my surprise, the power pulled by the phone went from 7....
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0answers
39 views

Problem with MAX1645B test circuit?

Please consider the schematic: The MAX1645B is a level 2 battery charger. My problem is with the P-Channel MOSFETs. There are two P-Channel MOSFETs in the above circuit. From the datasheet: ...
0
votes
1answer
29 views

PV battery connection

1)What happen if a PV array of 30 Vmp is connected to a 12 volt battery(lead acid)? 2)Do i need a buck converter to 12 volt between the pv array and the battery to connect them together?
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0answers
13 views

What do I need to run a XT30 Parallel Charging Board [closed]

So currently I have an Eachine Wizard X220, I have 5 1500 mAh 11.1v 3s batteries and I have a charger (similar, not exact) Currently, I can only fly every other day because it takes so long to ...
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1answer
62 views

Solar charge set up damaging battery?

I've installed a 12V 80W solar panel plus controller and attached it to a 12V 105Ah leisure battery. At first it (appeared to?) work. The charge status on the solar charge controller was at max and it ...
2
votes
1answer
64 views

How do integrated charger ICs dissipate differences in VCC and the battery voltage?

I was looking at a couple of charging ICs (BQ2002 for instance) and some of the fast charger ICs can charge up to 2A whilst running of a 5v supply. In this case charging a empty 1v NiMH cell means ...
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1answer
26 views

li-ion battery managment system, cell protection difference?

Could you help me to clear up what the battery management system/BMS adds to cell level protection, what is the difference? I assume that if I have many cells in series if I only have cell protection ...
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0answers
37 views

Charging Phone with a Modified Power Supply [duplicate]

I have converted a computer power supply into bench top power supply and I am now ready to add some USB ports to charge various devices. On the power supply label it shows the 5v rail is capable of ...
1
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2answers
49 views

Replace 3.7V flat tablet battery with a 18650 cell

I am building a device using cheap Chinese tablet. One of the problems I have is weak built-in battery. I'd like to replace it with a few 18650 cells. As far as I know, 18650 cell can be charged up ...
0
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0answers
55 views

Minimum current to charge a 5v device? [duplicate]

I'm trying to use a DC-DC converter to charge a mobile phone. This is the converter....TRACO 12v-5v converter The converter is relatively low power, (5w) and can supply a maximum of 1amp. Testing ...
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0answers
101 views

AC water turbine

I am trying to use a water turbine from China to charge a lithium ion battery. The water turbine is rated to 10 watts. I figured that should be enough to charge the battery but I can only ever get ...
-1
votes
1answer
28 views

How should a load be connected in a configuration of a MPPT solar charger and a LiPo battery?

I am designing a circuit for MPPT solar charger SPV1040 which could charge a single-cell LiPo battery. I am using AN3319 and AN4050 application notes for reference. I also want to connect a load ...
1
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2answers
83 views

Buck converter for Li-Ion 2s battery charger

I'm currently doing a project that requires the charging of a 2s Li-Ion battery. I have an 18V 10W solar panel that I want to charge my battery using a buck converter. Im controlling the switch and ...
0
votes
1answer
38 views

MPPT lead acid over voltage

As I understand it, an MPPT algorithm adjusts the charging voltage until it finds the point where maximum power is delivered into the battery. If a 12V lead-acid battery is used, is there an upper ...
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3answers
122 views

Why doesn't the voltage drop across the resistors of my battery charger follow Ohm's law?

Here's the setup, the three items below are in series: Battery at 215V Power supply at 250V (It is a 5A constant current power supply that will drop voltage down to 200V minimum before failing) 8 ...
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0answers
36 views

Two solar panels with separate battery or one panel with one battery?

I have already bought a 12 V 40 W solar panel. Its controller is also on the way. I will be using it to charge a lithium ion battery pack of 12 V 13 Ah. The charge controller ...
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0answers
18 views

LiPo ballancing circuit

I'm designing a circuit board to which I'll be able to connect multiple LiPo batteries (2-6S) and charge them in parallel without bothering user about balancing those packs firstly. So the charging ...
0
votes
1answer
24 views

1S or 2S li-ion battery charging design for ESP32/Nextion device

I am designing a portable battery powered device and trying to decide on my battery configuration. It will use an ESP32 chip with a few additional ICs, which will draw about as much current as an ...
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votes
2answers
104 views

Which resistors to use for high current (10A) voltage-divider? [closed]

I'm having a problem determining resistor specs (especially wattage) for my voltage divider circuit [ 27 V to 17.5 \$+-\$ 0.5 V ] on 10 ampere DC supply. I have an AC (220V 50Hz) to DC (27V 10A) ...
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0answers
60 views

Charger for lead-calcium battery circuit

I post it because i want to know if anyone of you see any rare in this circuit made in proteus 8.6, i accept any observation, this circuit provide 12v of output and 3 modes of charging fast(15 A), ...
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0answers
55 views

clamping the battery voltage with zener diode?

I want to do an experiment with a battery I have. I have 200AH 6v lead acid battery and I want to charge it with maximum current the battery can take in bulk stage, then in float or acp. stages, I ...
0
votes
1answer
49 views

Can this portable power generator charge this battery? [closed]

I am considering purchasing an e-bike but I have no outlets at my parking space and it's a non-removable battery. The e-bike looks like a motorcycle. I am considering getting one of those portable ...
-2
votes
1answer
60 views

Does the drive train of an EV affect the charging speed of the battery? Why? [closed]

In the latest tesla announcement they said: “Paired with the new more efficient drivetrain design, Model S and Model X are now capable of achieving 200 kW on V3 Superchargers and 145 kW on V2 ...
3
votes
1answer
68 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 ...
0
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0answers
51 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
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0answers
34 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 ...
1
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2answers
114 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 ...
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0answers
16 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
44 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
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0answers
24 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
20 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
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1answer
29 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 ...