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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61 views

If fast charging a device causes the lithium battery to drain faster, why doesn’t that apply to Tesla super chargers? [on hold]

Some iPhone chargers are 'fast' chargers which deliver more than a single amp and charge the iPhone faster. Tesla Superchargers are known for charging a battery fast as well. But since charging ...
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1answer
24 views

Li-ion custom protection circuit module (PCM) design and de-rating

I am designing a custom PCM (protection circuit module) for Li-ion cells provided by a supplier ( they offer PCMs but they do not meet our RF immunity spec ). The supplier-provided PCMs have a charge /...
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1answer
116 views

Building a Huge 18650 Battery Powerbank DIY [closed]

I know there are a lot of threads about this topic already, but I still have some questions about it. Anyways, I am thinking about making a 50-80 thousand mAh power bank depending on the batteries and ...
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28 views

Touching a charging phone creates buzz in bluetooth headphones [closed]

I have a bluetooth headset connected to my phone, and if my phone is connected to a charger, and I touch my phone (hold it, use the screen), then I can hear this low buzzing noise in my bluetooth ...
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1answer
58 views

10 Amp Current Limit

I have a 28VDC, high current supply (constant voltage) that is required to charge an emergency power supply. These EPS internals are rated at 15 amps max input current, however, it’s stipulated that ...
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1answer
49 views

How to choose appropriate DC-DC converter for Electric Vehicle battery charging application? [on hold]

I'm currently working on a project which requires building an EV battery-charger as a starting point. At present, I wish to design it for a 220 V, 50 Hz grid source input. The nominal voltage of the ...
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1answer
32 views

Charging series / parallel 18650 battery pack

I have a 18650 battery cell configured as 4 pairs in parallel wired in series for 16 volts. I first CC/CV charged the paralleled pairs to 4 volts each and stopped the charge at 50mA. I would like ...
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0answers
54 views

Is it possible to fully charge a 12V lead-acid traction battery using a car battery charger?

I got a 45Ah 12V traction battery for my experiments and I was assuming that I can recharge it using a normal car battery charger (the main difference between 12V car starting battery and 12V lead-...
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1answer
122 views

Does keeping a mobile phone plugged in increase its battery's lifetime?

As far as I understand, keeping a mobile phone plugged in would draw current from the source (i.e. an USB port) rather than from the battery. Therefore, the battery would not be used as long as the ...
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14 views

Charging and monitoring LiPo battery on docking station

How can I charge a LiPo battery (4 cells) without the "classical Lipo Balance Charger". Also, is it possible to monitor the battery level from, let's say a Raspberry Pi?(Using the 4 pins that are ...
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1answer
48 views

Maximum Initial cutrent parameter of Lead-acid batteries

On lead-acid batteries, there is a parameter called "maximum initial current" which is generally written on it. I have added some pictures of it at the end of the question. My confusion is how to ...
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59 views

Power Switching Issue [closed]

I am using the LRS-35-12 SMPS (12V, 3A) for supply and charging 2-cell battery 7.4V, 6600mAh with a charging current 600mA. The supplies are parallel which is switched by LTC4412 power path controller....
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1answer
57 views

How to optimize the life of a Lead Acid deep cycle battery?

I have a lead-acid battery : HANKOOK DC24MF DEEP CYCLE 80Ah 12V. In hope of extended this battery's life, I was thinking about buying an identical one and put it in parallel. This way by using "80Ah",...
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2answers
49 views

How do chargers with different output values work?

I have a few USB-C devices with their own chargers and I'm not sure if I can interchange them. What's confusing me is the different output values listed on the charger. From what I understand too high ...
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14 views

Unexpected battery float voltage in BQ2057WSN charging circuit

We have designed a changing module using BQ2057WSN IC to charge a 7.4V, 6600mAH Li-ion battery. My supply power is 12V,2A SMPS. I have set my charging current to 600mA. The battery is charging, but ...
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37 views

MPPT controller with battery management system

I'm trying to create a little solar charger with backup battery for my Arduino. I would like to use a MPPT controller for the solar panels. I found a few solutions like the IC CN3722, but all of these ...
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1answer
77 views

Building a circuit to replicate a LiPo battery

We want to keep a Xiaomi Mix smartphone powered on for a very long time (>6 months) with power from the USB cable. This is not recommended by the manufacturer since the battery will be constantly at ...
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1answer
52 views

How to charge and use a salvaged laptop battery with BMS?

I have salvaged a laptop battery but I have no idea how I can use it like a normal battery. It does have a 10 pins connector but I have no idea what they are doing and how I can use them. Should I ...
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1answer
31 views

BQ2057WSN Charging current issue

Today when I was going to measure charging current in BQ2057WSN charging circuit (Input Supply: 12VDC, Battery: 7.4V,6600mAH) by putting a multi meter in series with Q1 (shown in figure) and measured ...
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29 views

Power management controller with multiple inputs

I have planned a (quite complex) controller for a project based on a Raspberry Pi (web UI, logging, camera framegrabbing/video processing, LTE uplink), i2c sensors (assortment of environment sensors), ...
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34 views

BQ2057WSN Circuit Heating issue

We are using BQ2057WSN charging IC to charge a 7.4V, 6600mAh Li-Ion Battery by providing 12VDC,2A power supply. According to my calculation the charging current is set at 625mA. But while charging, ...
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2answers
42 views

BQ2057WSN Charging issues

I have designed a battery charging Module using BQ2057WSN IC to charge a 7.4V,6600mAH Li-ion battery. According to my calculation the charging current is set at 625mA. The input power source to the ...
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1answer
78 views

How does Home UPS Charge battery?

I have a pure sine wave home ups with a mains 1000VA transformer in it. Transformer is 6.7/220VAC. How does it charge a 12V battery with 20A????????? 6.7V side is connected in H bridge mosfets. ...
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1answer
37 views

Trying to understand Battery Chargers vol.2 [duplicate]

The answer by Bill dubuque was very helpful and got me to read the complete datasheet of MCP73831/2, but there is one thing from the datasheet that I don't fully understand and is the cause of lots of ...
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3answers
92 views

Wind turbine charger controller

I need help on my design which includes a wind turbine, charge controller, battery and load. The question is, what will happen to the load if the wind turbine is charging the battery and while it is ...
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1answer
81 views

Solar charging LiPo batteries

I would like to build a IoT project which needs need 5V. I have some 6V 1w solar panels which I would like to connect in parallel to charge some LiPo batteries 3.7V https://www.ebay.de/itm/6V-1W-...
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2answers
105 views

On off button for my microcontroller board

Here is my charger unit and voltage regulator for powering a MCU board that I designed. I'd like to ask, how can I add an on/off button which allow charging the batteries even we turn off the system ...
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1answer
29 views

Combining two power outs along with voltage regulator

I have two seperate solar panels with exact same circuitry connections. This is what I have: Solar panel -> Sparkfun Buck boost converter (set on 5v) -> TP4056 -> single 18650 AND + and - Power out ...
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3answers
60 views

Can I use a current control buck converter to charge a battery?

As shown below, could I use a microcontroller to charge the Li-ion battery? I'm unsure if I'll run into issues with the voltages on the ADC. I've done this exact setup before with a generic load, I'm ...
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1answer
40 views

12 V / 140 Ah lead acid battery charging with 24 V / 150 A alternator

Can I connect two 12 V / 140 Ah lead acid batteries in series to get 24 V / 140 Ah and connect directly to a 24 V/ 150 A alternator to charge them? Or do I need any charging / protection circuit in ...
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1answer
46 views

Lithium Ion Battery Charger and Power Path Management IC

I am to analog electronics. I am building a circuit that has a lithium ion battery. I understand the importance battery charger in battery management. My question is how does a designer set ...
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1answer
76 views

24v output from two 12v batteries in series, charge them with 12 volts in parallel

I have a solar charge controller which can charge 12volts batteries. I have two 12 volt batteries which are connected in parallel. I need to have 24volts output without using dc-dc step up converters. ...
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1answer
54 views

Help Identifying Parts of a Battery Management Board

I am currently way over my head in a personal project to design and create a 5 cell battery protection system. I'm fairly confident that I've correctly cloned the cell balancing section (section C) of ...
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3answers
151 views

How can I trickle charge NiMH batteries as part of an IOT controller?

I have built an IOT motor controller board that's powered by 4 AA NiMH batteries in series. I want to use a solar panel to trickle charge the batteries, but the voltage slowly decreases even when the ...
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2answers
43 views

What is pv cut off for 100amp(12v) lead acid battery?

I have 100 A lead acid battery and it charged with solor controller charger, the charger remains on after crossing 14.4V. Is this harmful for battery life? If it is dangerous, what is PV cut to charge ...
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1answer
29 views

How does an optimized car battery charging system could be designed?

To start, I saw a scooter electrics. In that implementation, after quite a weak (in my sense) generator it has some shunt linear regulator, that just dissipates overvoltage to heat. Oh god! Weak ...
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0answers
21 views

Can a bad cell cause excessive heat in charging circuit?

Something I have noticed and am curious of. I had a cases where a lithium ion cell, is bad or dead and it seems to cause overheating in the IC chip on the charging circuit Today I was having issues ...
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0answers
25 views

TP4056 - Li-lon Battery Charger enable pin not working

I designed a small lithium battery charger with the IC TP4056 but apparently the enable pin (CE) is not working. My setup is depicted in the following block diagram: Basically the input voltage (...
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2answers
68 views

How does DW01a prevent overcharing and discharging?

I am not that familiar with electronics, it's just hobby like. Today I am reviewing the tp4056 and dw01a ics. That are used for battery charging. Actually there are no specials on these ics but I ...
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2answers
76 views

What is difference between DC current from dynamo and DC current from battery? [closed]

Dynamo generate DC current and battery also gives DC current. Here my question is when I use inverter, it worked with battery however doesn't work with same voltage of current from dynamo. Why? ...
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1answer
64 views

12V - How to activate an electric item if battery is full

I have a solar system 12V connected to a PWM controller 20A and a lead-acid battery 80Ah deep cycle. What kind of setup should I make to activate a pump (12V) if the battery is full ( >13.8V ) ?
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31 views

Can I Charge With An MCP73831?

Sometimes I need to take my laptop places and, it doesn't have the greatest battery life, sometimes maybe it only lasts 10 minutes. So after researching a bit I decided I wanted to build a li-ion ...
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1answer
83 views

Is is safe to let my PWM charge my 12V battery at 14.8V?

I have a 12V battery linked to my solar panels. In the middle I have a PWM charge controller, that is configured by default to charge the battery if Voltage if lower than 14.8. At night, battery ...
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1answer
32 views

what is the max charge current of BQ2057?

I have gone through the datasheet of this single cell Li-ion charge IC BQ2057 but I couldn't find the charge current detail
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1answer
61 views

Do standard NiMh AA or AAA battery's have any kind of BMS or protection circuit built-in?

Do standard rechargeable NiMh AA or AAA battery's have any kind of protection circuit like over discharge? Or are there any circuits out there that do that kind of stuff? I want to power my Arduino ...
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1answer
52 views

Would this design carry too much current and damage battery charger ICs?

I'm planning on designing a system to charge multiple 3.7V 500mAh lithium-ion batteries simultaneously. The batteries are each going to be charged through a battery charger IC, here is the link to the ...
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0answers
34 views

Is it possible to somehow revive an AGM battery, that quickly loose voltage when used?

I have a GLP 120-12 AGM battery, this thing to be exact: https://glpower.eu/produkt/glp-120-12/ It's a 120 amps batter, and it is about 26 months old. All of a sudden, I noticed that the battery is ...
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0answers
33 views

Power supply charging backup power - current flow via mosfet

I have following diagram on falstad Top +5V is main PSU (12V 10A). Bottom +5V is battery (12V 2.3Ah). I have load about 2-3A so I dont think diode is good solution. Well I am trying to achieve ...
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1answer
68 views

Charging 3P pack of 18650 batteries using a single TP4056, and protection standards

For a project at uni, I'm trying to learn to work with 18650s and TP4056s. One of the tasks is to be able to USB-charge three 18650s (Panasonic NCR, 3350 mAh each) in parallel, whilst also being able ...
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2answers
98 views

Calculating battery current during charging in CCCV

I am researching how (lithium-ion) batteries are charged using CCCV. Specifically, I am interested in the "constant-voltage" part of the process: My question is - how do I calculate current \$i\$ ...