Questions tagged [lithium]
Lithium batteries are disposable/non-rechargeable batteries, often found in button/coin-cell form and sometimes in cylindrical cell form. Lithium batteries are used in portable consumer electronic devices, including watches, cameras, calculators, thermometers, etc.
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24v Electric car kiddie regen brake issue [duplicate]
Looking for some help please. We manufacture small off road Land Rover Defenders for holiday parks and the likes. Up until recently these cars have run off 3x 8v lead acid batteries with a ...
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Lithium battery pack in series or parallel
The goal is to build a 200V Lithium battery pack using 21700 cells.
I am trying to make a design decision on lithium battery pack architecture for an electric vehicle and it boiled down to below two ...
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Charging an 18650 Li-Ion cell via a bicycle hub dynamo
I'm interested in building a buffer battery for a 12V GPS tracker using a single 18650 Li-Ion cell. It will be mounted on a bicycle and unfortunately I haven't found a design for a tracker including ...
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Certification for Lithium-battery-powered devices
I am designing a device that would use a lithium battery inside, I have read that the battery should be certified with IEC 62133.
But my question now is: if I used a certified battery cell(s) in the ...
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Question on Battery Charger
I need a Lithium ion battery for a project.
In many places, I have searched and there seem to be 2 different voltages for the Li-ion battery.
One is 3.7V and one is 4.2V.
In someplaces, it is said ...
user220456
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How can I safely replace laptop battery pack cells before removing the old cells?
Replacing lithium ion cells in an old laptop battery pack, I want to connect the new cells in parallel before removing the old ones to avoid the BMS locking (if it even would do that). The pack uses ...
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Can I mix three 18650s with different brands?
I have three 18650 batteries with different brands, but the same voltage and capacity. Can I mix them using a 3s BMS with balancer without a risk?
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Does a "normal" lithium battery BMS limit the current going into the battery when charging?
If I hook up a 42 V voltage source with an absurd peak amperage to a 42 V battery through a BMS, will it protect the battery from too much current?
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Convert AAA battery device to LiPo
I have lots of small (500mAh) LiPo cells taken from Vaping devices (eCigarettes). I want to reuse them in some consumer electronics devices that run off 2 AAA batteries. There is generally space ...
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Is taping a safe and effective way of connecting lithium ion batteries?
I am in the process of changing the battery cells in my laptop battery pack and have to somehow connect lithium ion cells. I unfortunately do not own a spot welder and buying/making one for this ...
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Is it feasible for an amateur to bring to market a product with a lithium battery?
I'm a hobbyist/amateur who has been successfully selling a USB MIDI device for several years, and I'd like to make a new battery-powered version. It would ideally have a small (150 mAH) li-poly or ...
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Wouldn't charging a lithium battery to 80% only defeat the purpose of putting the battery into longer use in the first place?
I see most smart devices (laptops/tablets/phones) now have the option to optimize your battery by charging it to 80% only.
But wouldn't this reduce your capacity i.e. your brand new battery now only ...
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How to control current to charge batteries?
I have an Arduino project that is powered with a 1s battery pack (multiple 18650 in parallel).
I use following module to protect against overcharge/overdischarge : https://aliexpress.com/item/...
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LiFePo4 Battery management system
I am creating a 2Ah 3 cell LiFePo4 battery using individual lifepo4 batteries, for a project that requires solar charging from a genasun mppt controller. Considering the battery is split into 3 cells, ...
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LIthium 18650 discharge voltage
I am capacity testing 18650 batteries from old laptops using constant current, previously I used 2.8V as discharge/cutoff voltage but now raised the value to 3.0V
Discharge current is 1Amp.
I know ...
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When do I have to worry about shorting? (Coin cell battery assembly)
At work I assemble coin cell batteries (lithium ion) inside a glovebox. I'm a bit confused as to when I do and do not have to worry about shorting. For example, say I'm making this battery:
Cathode: ...
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Which battery will be good for gas/water metering - lithium thionyl chloride or lithium manganese dioxide?
We are working on gas/water meters.
We are currently using lithium thionyl chloride batteries for our device. After reading some technical documents we found that the lithium manganese dioxide ...
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Lithium battery - understanding health, current capacity and expected lifespan
Short Question :
I've got a Tadiran TL-5104 battery - data sheet HERE
I've tested the battery with a multimeter at room temp (c. 20 °C) and got the following readings : 3.57 V, 0.85 mA
From the above ...
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Recharging CR2032 (LiMnO2) battery in a pinch
My digital calipers take a 3V 2032 (coin cell) battery, they currently contain a CR2032 (lithium manganese dioxide). It's on the very low end of remaining charge, I have no spares, and no easy way to ...
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If I connect three different capacity lithium batteries in series with a 3S BMS board, When the BMS will stop giving output?
If three different capacity batteries are connected in series with a 3S BMS board, when the lowest capacity battery runs out and under voltage occurs of the battery then will the BMS continue giving ...
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Can I parallel two TP4056s to charge 1 cell?
I have a 3600 mAh Li-ion battery and I want charge it at 2 A. I want to use a TP4056 module but its output current is 1 A max.
So I decided to use 2 modules in parallel like I drew in the picture. Is ...
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48V Lithium Battery Cutoff Detection Circuit
I'm building a power system using four x 48 V 100 Ah lithium batteries in parallel (48 V 400 Ah nominal). The batteries are already purchased, there is no going back. The cells cannot be accessed, ...
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Is it suitable to wire 'protected' li-ion cells in series and parallel? 2S6P
Here is the circuit designed to give about 7V. Each cell would be a protected cell.
Is it safe to connect these cells that way?
Thanks
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I have a five 12 V DC motors and I want to use an SMPS instead of lithium battery
I have five 12 V, 3 A DC motors and a lithium battery pack, 12 V, 30 Ah and an SMPS, 12 V 30 A. Can I use the SMPS as the motor power supply instead of batteries?
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I have two lithium battery packs with separate BMS, Can I connect the packs in Parallel?
I have two lithium battery packs with separate BMS, Can I connect the packs in parallel, will the BMS get damaged or will something happen?
12v 10ah battery pack, I have three in total and each has it'...
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Can I connect a smart charger to a lithium battery with a BMS
I have several tools with NiCad batteries which are failing due to the age of the batteries. I refuse to throw these perfectly good tools away and wish to convert the batteries to lithium.
I HAVE ...
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Reverse voltage protection for lithium battery charging module with smd component(s)
I want to add to this famous single cell lithium ion battery charging module a reverse voltage protection:
I ended up with the following circuit (Load draws up to 700mA):
Updated:
My question(s):
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Determining charging voltage under load
I'm building a backup system for some computer hardware which is roughly a constant 20W of power at ~48V. I've built a 13S5P Li-Ion pack from the following cells. I'm experimenting with different ...
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Reverse charge protection for parallel primary lithium cells (CR2450)
First time poster, long time follower here.
I am looking into the safety aspect of using primary lithium cells in parallel. The reason behind using parallel cells is to increase overall capacity. In ...
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LiFepo4 RV battery bank, charge from beefy alternator setup
What I've got
5x, 200Ah LiFepo4 batteries in a 12V, parallel bank. I'm looking at putting in a Sinister Diesel ...
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Replacing Dallas NVRAM with larger capacity variant?
This DS1225AB-200 (8k x 8 = 64kB NVSRAM) is from 1995 and is probably dead (cannot measure from the outside.) The only close replacement in stock is a DS1230AB-100 (32k x 8 = 256kB.)
Looking at the ...
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Is it possible to disable a TP4056 lithium battery charge IC when no battery is present?
I have a circuit that's setup to use either USB or a 3.7V lithium battery. When both are plugged in at the same time, the battery is charged through a TP4056 IC. The charger also has two LEDs attached ...
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Connecting lithium ion batteries in parallel
I have 6 lithium ion batteries that are from some Android tablets that I've recycled, they are rated as 5000 mAh, 3.8 V
and have their own protection PCBs soldered to them. The tablets they came from ...
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DC Step-up Boost Voltage regulator (High Ampere)
I’m working on a project, where I want to go from 5 Lithium-ion cells in series, to 5 Lithium-ion cells in parallel, for versatility purposes i.e. in time, I want to be able to change the output ...
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Lithium Battery Pack Cell Arrangement: Parallel First or. Series First (4P16S or 16S4P)?
I am looking to arrange 64 individual LiFePo4 cells into a large 48V pack. So I can do 4P16S or 16S4P. All cells are new. I can add individual fuses to each cell if necessary. The capacity of each ...
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Parallel BMSs with LiFePO4 Packs
I'm trying to design a BMS that allows for multiple larger packs to be connected together in parallel (say, multiple 4S LiFePO4 packs). Using an unconnected conventional BMS SOC there's obviously the ...
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Lithium Ion Battery Charge & Discharge via Shared Input & Output Lead
I'm seeking to rebuild a few ancient NiCad & NiMh batteries for some vintage laptops I'm fond of, and in the process would like to convert them to Li-Ion. I'll be placing the lithium cells behind ...
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Question about mixing battery sizes and quantities
Ok. I have searched everywhere and can't find a definite answer on this:
My first question, Is, Can you mix 2 lithium batteries of different sizes together? (Like mixing an 18650 lithium battery with ...
user256116
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Can I use a lithium charger for a bluetooth speaker with a NiMH battery? [closed]
I have a BlueAnt bt blast bluetooth speaker that I need a new charger for. It says DC 12V on the back by the power supply. I checked the manual and this speaker has a NiMH rechargeable battery. Can I ...
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How to determine the practical constant current rate of charging phase of a Lithium battery?
As discussed earlier, terminal voltages would never exceed the CV value (4.2V for Li-Ion cell) while charging:
If that's the case, the CC value should be the current value at the time the terminal ...
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Would floating a Lithium battery indefinitely at a lower voltage than max voltage cause any harm?
As a rule of thumb, charging should be terminated when the charging current drops to 0.1C at constant voltage phase of lithium battery charging. Membranes would have over stressed otherwise, which ...
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How to drop 5v regular phone charger voltage to 3.7v to run a device, which use 3.7v output battery before
I have Motorola Moto 360 2st edition smartwatch and watch original battery is dead. I have converted smartwatch into table watch in DIY wooden block and added 18650 3.7v battery instead and now its ...
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Lithium battery charger and balancer circuit (or IC)
I am working on a project which sould charge and balance 4 to 6 (maybe 8 in future) serial connected lithium cell batteries (~4000 mAh capacity) with about 4A of charge current.
First I looked for IC ...
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IATA battery rules
Following IATA guidelines two threshold limits are indicated: 20Wh for cells and 100Wh for multi-cell batteries.
Question: Should I apply 20Wh limit also for cells in multi-cell batteries?
Example: ...
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Do li-po batteries need esd protection?
I bought some li-po batteries and they were in antistatic bags. They have protection circuits. Do they need esd protection (grey bags)?
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What is the charger voltage graph while charging Lithium battery with CC/CV approach?
What is the voltage graph from the point of view of the charger while performing a CC/CV charging?
Isn't a "Dedicated Lithium Ion CC/CV charger" simply "a Constant Voltage DC Source with Current ...
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Effect of rapid switching between charging and discharging of Lithium batteries
I have made a DIY off-grid solar generator that utilizes an Arduino to determine when to dump excess energy to a water heating load.
I have programmed the Arduino to activate the load circuit when the ...
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Can lithium batteries and lead acid batteries be used together? [closed]
If I have the two batteries with same voltage but different capacity, can lithium batteries (the lfp battery like this type) and lead-acid batteries be used together?
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What is the effect on lithium ion batteries from long term storage in sub-freezing temperatures?
I am designing an off-grid power system for a mountain cabin that is not used in the winter. The ambient temperature can get as low as -20deg F (-29deg C) during the winter. Due to snow and other ...
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How to safely test a lithium battery management system board
I'd like to design a battery management system board (based on TI bq40z50-R2) for my own small (2-4s) lithium battery pack, but I am still unsure how can I test it safely.
I am worried that an error ...
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